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Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

सेंटर फॉर साइंस एंड एनवायरनमेंट (सीएसई) द्वारा जारी एक नए विश्लेषण के अनुसार, ओजोन, एक अत्यधिक प्रतिक्रियाशील गैस और श्वसन की स्थिति और अस्थमा से पीड़ित लोगों के लिए खतरनाक, दिल्ली और राष्ट्रीय राजधानी क्षेत्र (एनसीआर) में सभी मौसमों में अधिक व्यापक होती जा रही है। शुक्रवार को। विश्लेषण में कहा गया है कि इस धारणा के विपरीत कि ओजोन, सूर्य के प्रकाश की उपस्थिति में गैसों के बीच संपर्क से प्रकाश-रासायनिक रूप से उत्पन्न होता है, मुख्य रूप से एक गर्मी की घटना है, गैस सर्दियों के दौरान भी उतनी ही मजबूत चिंता के रूप में उभरी है। सीएसई की कार्यकारी निदेशक अनुमिता रॉयचौधरी ने कहा, “ओजोन अब साल भर की समस्या है जिसके लिए स्वच्छ वायु कार्यक्रमों पर तत्काल ध्यान देने की जरूरत है।” “इससे होने वाले जोखिम को अक्सर अच्छी तरह से नहीं समझा जाता है, क्योंकि सभी निगरानी स्टेशनों से डेटा को स्थानिक रूप से औसत करने की वर्तमान नियामक प्रथा वक्र को कुंद करती है, और सबसे बुरी तरह प्रभावित स्थानों से और विभिन्न मौसमों के दौरान खतरे की भयावहता को कम करके आंकती है। “चूंकि ओजोन एक अत्यधिक प्रतिक्रियाशील गैस है और यहां तक ​​​​कि अल्पकालिक जोखिम श्वसन की स्थिति को बढ़ा सकता है जिससे आपातकालीन अस्पताल में प्रवेश हो सकता है, इसके लिए जोखिम मूल्यांकन और संचार के लिए एक अलग दृष्टिकोण की आवश्यकता होती है,” उसने कहा। एक अन्य विशेषज्ञ ने कहा कि ओजोन मानकों को पूरा नहीं करने वाले दिनों की संख्या सर्दियों में भी बढ़ रही है। सीएसई के सस्टेनेबल सिटीज प्रोग्राम की अर्बन लैब टीम के प्रोग्राम मैनेजर अविकल सोमवंशी ने कहा, “इस विश्लेषण से पता चलता है कि सर्दियों के महीनों में भी ओजोन मानकों को पूरा नहीं करने वाले दिनों की संख्या बढ़ने लगी है, जिससे सर्दियों का स्मॉग और अधिक जहरीला हो गया है।” मूल्यांकन में 2018 और 18 जुलाई, 2021 के बीच विभिन्न मौसमों – गर्मी (मार्च-जून), सर्दी (अक्टूबर-फरवरी) और मानसून (जुलाई-सितंबर) के दौरान रुझानों का पता लगाया गया है। इसमें कहा गया है कि 2020 में 290 दिनों में जमीनी स्तर के ओजोन के लिए आठ घंटे का मानक दिल्ली के एक स्टेशन में कम से कम एक स्टेशन से अधिक था, जो 2019 की तुलना में 30 दिन और 2018 की तुलना में 26 दिन अधिक है। इस वर्ष पहले ही 169 दिनों की अधिकता दर्ज की गई है, पिछले वर्ष की समान अवधि के लिए 21 दिनों की वृद्धि, विश्लेषण से पता चला है कि एनसीआर में, गुरुग्राम ने 2019 और 2020 के बीच अधिक दिनों की संख्या में अधिकतम उछाल देखा – इसकी टैली 2020 में 201 दिनों की संख्या पिछले वर्ष की तुलना में 300 प्रतिशत से अधिक की वृद्धि थी। “नोएडा ने भी 54 प्रतिशत की छलांग दर्ज की। फरीदाबाद ने 2019 और 2020 के बीच कोई बदलाव नहीं दर्ज किया। गाजियाबाद और ग्रेटर नोएडा में गिरावट देखी गई, जिसमें बाद में 28 प्रतिशत की सबसे बड़ी गिरावट देखी गई। तुलनात्मक प्रवृत्ति विश्लेषण करने के लिए मेरठ के पास 2019 के लिए पर्याप्त डेटा नहीं है, लेकिन 2020 में 109 दिनों की अधिकता के साथ, यह एनसीआर में सबसे कम प्रदूषित प्रमुख शहर था।” सीएसई ने कहा कि केंद्रीय प्रदूषण नियंत्रण बोर्ड (सीपीसीबी) के आधिकारिक ऑनलाइन पोर्टल सेंट्रल कंट्रोल रूम फॉर एयर क्वालिटी मैनेजमेंट से दानेदार रीयल टाइम डेटा (15 मिनट का औसत) प्राप्त किया गया है। “दिल्ली-एनसीआर (दिल्ली में 40 स्टेशन, गुरुग्राम, फरीदाबाद, नोएडा और गाजियाबाद में चार-चार, मेरठ में तीन, और दो में) में फैले निरंतर परिवेश वायु गुणवत्ता निगरानी प्रणाली (सीएएक्यूएमएस) के तहत 81 आधिकारिक स्टेशनों से डेटा कैप्चर किया गया है। ग्रेटर नोएडा जबकि एनसीआर के 20 छोटे शहरों में एक स्टेशन है), “यह कहा। इस स्टेशन-स्तरीय डेटा से, विश्लेषण ने रुझानों की गणना उन दिनों की संख्या के संदर्भ में की है जब दैनिक स्तर आठ घंटे के मानक से अधिक हो गया है। सीएसई के अनुसार, शहर-व्यापी औसत बड़े पैमाने पर मानक के भीतर रहता है, जिसमें कभी-कभार ही अधिकता होती है। “लेकिन इस मानदंड से भी, दिल्ली में “अच्छे” श्रेणी के दिनों (दैनिक आठ घंटे की एकाग्रता मानक से 50 प्रतिशत नीचे) में गिरावट शुरू हो गई है। 2020 में, दिल्ली में 115 “अच्छे” दिन थे, जो पिछले दिनों की तुलना में 24 दिन कम थे। 2019, “यह कहा। सीएसई ने कहा कि स्थान-वार विश्लेषण के अनुसार, शहर में आठ घंटे के औसत मानक से अधिक व्यापक रूप से वितरित किया जाता है। “यहां इस्तेमाल की जाने वाली कार्यप्रणाली यूएसईपीए (यूनाइटेड स्टेट्स एनवायर्नमेंटल प्रोटेक्शन एजेंसी) पद्धति के अनुरूप है, जिसमें प्रत्येक रिपोर्टिंग क्षेत्र के सभी मॉनिटरों के बीच उच्चतम एकाग्रता पर विचार किया जाता है,” यह कहा। विश्लेषण में पाया गया कि ओजोन का निर्माण एक अति-स्थानीय घटना है क्योंकि दो पड़ोसी स्टेशनों के बीच ओजोन स्तरों में 100 माइक्रोग्राम प्रति घन मीटर (μg/m3) अंतर हो सकता है। “27 अप्रैल, 2021 को दिल्ली में स्थानों के बीच 150 माइक्रोग्राम/घन मीटर तक भिन्नता देखी गई। यमुना से सटे क्षेत्रों, लुटियन की दिल्ली और पश्चिमी दिल्ली में ओजोन का स्तर कम रहा, दक्षिण, मध्य और उत्तरी दिल्ली में उच्च स्तर दर्ज किया गया, जबकि दक्षिण-पूर्वी दिल्ली में उस दिन उच्चतम स्तर। श्री सोमवंशी ने कहा, “फिलहाल, शहर में चरम प्रदूषण की गणना करना संभव नहीं है क्योंकि सीपीसीबी से उपलब्ध डेटा 200 माइक्रोग्राम प्रति घन मीटर है। इससे दैनिक एक्यूआई रिपोर्टिंग भी अप्रभावी हो जाती है।”

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a highly reactive gas and dangerous for those suffering from respiratory conditions and asthma, is becoming more widespread in Delhi and the National Capital Region (NCR) across all seasons, according to a new analysis by Centre for Science and Environment (CSE) released on Friday. The analysis said that contrary to the notion that ozone, produced photochemically from interaction between gases in the presence of sunlight, is predominantly a summer phenomenon, the gas has emerged as an equally strong concern during winter as well. “Ozone is now a round-the-year problem requiring urgent attention of clean air programmes,” said CSE executive director Anumita Roychowdhury. “The risk from it is often not well understood, as the current regulatory practice of spatially averaging the data from all monitoring stations blunts the curve, and underestimates the magnitude of threat from the worst affected locations and also during different seasons. “As ozone is a highly reactive gas and even short-term exposure can aggravate respiratory conditions leading to emergency hospital admission, it requires a different approach to risk assessment and communication,” she added. Another expert said that the number of days not meeting the ozone standards is increasing even in winters. “This analysis shows that the number of days not meeting the ozone standards has begun to increase even during winter months, making the winter smog more toxic,” said Avikal Somvanshi, programme manager in CSE’s Urban Lab team of the Sustainable Cities programme. The assessment has traced trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It said that the eight-hourly standard for ground-level ozone exceeded at least in one station in Delhi on 290 days in 2020, which is up by 30 days compared to 2019 and 26 days more than 2018. This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in number of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was an increase by over 300 per cent from previous year. “Noida also registered a 54 per cent jump. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter showing the biggest drop of 28 per cent. Meerut does not have adequate data for 2019 to carry out comparative trend analysis, but with 109 days of exceedance in 2020, it was the least polluted major city in the NCR,” it said. The CSE said that granular real time data (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official online portal Central Control Room for Air Quality Management. “The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread across Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station),” it said. From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. According to the CSE, the city-wide average largely remains within the standard with just occasional exceedances. “But even from this yardstick, the “good” category days (50 per cent below the daily eight-hour concentration standard) have started declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days less than in 2019,” it said. According to location-wise analysis, exceedance of the eight-hour average standard is quite widely distributed in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all the monitors within each reporting area,” it said. The analysis found that ozone build-up is a hyper-local phenomenon as there can be 100 micrograms per cubic metre (µg/m3) difference in ozone levels between two neighbouring stations. “On April 27, 2021 Delhi saw variations as high as 150 µg/m3 between locations. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi showed low ozone levels, south, central, and north Delhi recorded higher levels, south-east Delhi had the highest levels that day. “At the moment, it is not possible to compute the peak pollution in the city as the data that is available from CPCB is capped at 200 µg/m3. This also makes daily AQI reporting ineffective,” said Mr Somvanshi.

Ozone becoming more widespread in Delhi-NCR across all seasons: Study

The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System CAAQMS spread across Delhi-NCR 40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station, it said.From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. PTI | New Delhi | Updated: 30-07-2021 22:28 IST | Created: 30-07-2021 22:22 IST Ozone becoming more widespread in Delhi-NCR across all seasons: Study Representative Image. Image Credit: ANI Country: India SHARE Ozone, a highly reactive gas and dangerous for those suffering from respiratory conditions and asthma, is becoming more widespread in Delhi and the National Capital Region (NCR) across all seasons, according to a new analysis by Centre for Science and Environment (CSE) released on Friday. The analysis said that contrary to the notion that ozone, produced photochemically from interaction between gases in the presence of sunlight, is predominantly a summer phenomenon, the gas has emerged as an equally strong concern during winter as well. ''Ozone is now a round-the-year problem requiring urgent attention of clean air programmes,'' said CSE executive director Anumita Roychowdhury. ''The risk from it is often not well understood, as the current regulatory practice of spatially averaging the data from all monitoring stations blunts the curve, and underestimates the magnitude of threat from the worst affected locations and also during different seasons. ''As ozone is a highly reactive gas and even short-term exposure can aggravate respiratory conditions leading to emergency hospital admission, it requires a different approach to risk assessment and communication,'' she added. Advertisement ''This analysis shows that the number of days not meeting the ozone standards has begun to increase even during winter months, making the winter smog more toxic,'' said Avikal Somvanshi, programme manager in CSE's Urban Lab team of the Sustainable Cities programme. The assessment has traced trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It said that the eight-hourly standard for ground-level ozone exceeded at least in one station in Delhi on 290 days in 2020, which is up by 30 days compared to 2019 and 26 days more than 2018. This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in number of exceedance days between 2019 and 2020 -- its tally of 201 days in 2020 was an increase by over 300 per cent from previous year. ''Noida also registered a 54 per cent jump. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter showing the biggest drop of 28 per cent. Meerut does not have adequate data for 2019 to carry out comparative trend analysis, but with 109 days of exceedance in 2020, it was the least polluted major city in the NCR,'' it said. The CSE said that granular real time data (15-minute averages) have been sourced from the Central Pollution Control Board's (CPCB) official online portal Central Control Room for Air Quality Management. ''The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread across Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station),'' it said. From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. According to the CSE, the city-wide average largely remains within the standard with just occasional exceedances. ''But even from this yardstick, the 'good' category days (50 per cent below the daily eight-hour concentration standard) have started declining in Delhi. In 2020, Delhi had 115 'good' days, which was 24 days less than in 2019,'' it said. According to location-wise analysis, exceedance of the eight-hour average standard is quite widely distributed in the city, the CSE said. ''The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all the monitors within each reporting area,'' it said. The analysis found that ozone build-up is a hyper-local phenomenon as there can be 100 micrograms per cubic metre (µg/m3) difference in ozone levels between two neighbouring stations. ''On April 27, 2021 Delhi saw variations as high as 150 µg/m3 between locations. While areas adjoining Yamuna, Lutyen's Delhi and west Delhi showed low ozone levels, south, central, and north Delhi recorded higher levels, south-east Delhi had the highest levels that day. ''At the moment, it is not possible to compute the peak pollution in the city as the data that is available from CPCB is capped at 200 µg/m3. This also makes daily AQI reporting ineffective,'' said Somvanshi.

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a highly reactive gas and dangerous for those suffering from respiratory conditions and asthma, is becoming more widespread in Delhi and the National Capital Region (NCR) across all seasons, according to a new analysis by Centre for Science and Environment (CSE) released on Friday. The analysis said that contrary to the notion that ozone, produced photochemically from interaction between gases in the presence of sunlight, is predominantly a summer phenomenon, the gas has emerged as an equally strong concern during winter as well. “Ozone is now a round-the-year problem requiring urgent attention of clean air programmes,” said CSE executive director Anumita Roychowdhury. “The risk from it is often not well understood, as the current regulatory practice of spatially averaging the data from all monitoring stations blunts the curve, and underestimates the magnitude of threat from the worst affected locations and also during different seasons. “As ozone is a highly reactive gas and even short-term exposure can aggravate respiratory conditions leading to emergency hospital admission, it requires a different approach to risk assessment and communication,” she added. Another expert said that the number of days not meeting the ozone standards is increasing even in winters. “This analysis shows that the number of days not meeting the ozone standards has begun to increase even during winter months, making the winter smog more toxic,” said Avikal Somvanshi, programme manager in CSE’s Urban Lab team of the Sustainable Cities programme. The assessment has traced trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It said that the eight-hourly standard for ground-level ozone exceeded at least in one station in Delhi on 290 days in 2020, which is up by 30 days compared to 2019 and 26 days more than 2018. This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in number of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was an increase by over 300 per cent from previous year. “Noida also registered a 54 per cent jump. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter showing the biggest drop of 28 per cent. Meerut does not have adequate data for 2019 to carry out comparative trend analysis, but with 109 days of exceedance in 2020, it was the least polluted major city in the NCR,” it said. The CSE said that granular real time data (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official online portal Central Control Room for Air Quality Management. “The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread across Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station),” it said. From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. According to the CSE, the city-wide average largely remains within the standard with just occasional exceedances. “But even from this yardstick, the “good” category days (50 per cent below the daily eight-hour concentration standard) have started declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days less than in 2019,” it said. According to location-wise analysis, exceedance of the eight-hour average standard is quite widely distributed in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all the monitors within each reporting area,” it said. The analysis found that ozone build-up is a hyper-local phenomenon as there can be 100 micrograms per cubic metre (µg/m3) difference in ozone levels between two neighbouring stations. “On April 27, 2021 Delhi saw variations as high as 150 µg/m3 between locations. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi showed low ozone levels, south, central, and north Delhi recorded higher levels, south-east Delhi had the highest levels that day. “At the moment, it is not possible to compute the peak pollution in the city as the data that is available from CPCB is capped at 200 µg/m3. This also makes daily AQI reporting ineffective,” said Mr Somvanshi.

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a highly reactive gas and dangerous for those suffering from respiratory conditions and asthma, is becoming more widespread in Delhi and the National Capital Region (NCR) across all seasons, according to a new analysis by Centre for Science and Environment (CSE) released on Friday. The analysis said that contrary to the notion that ozone, produced photochemically from interaction between gases in the presence of sunlight, is predominantly a summer phenomenon, the gas has emerged as an equally strong concern during winter as well. “Ozone is now a round-the-year problem requiring urgent attention of clean air programmes,” said CSE executive director Anumita Roychowdhury. “The risk from it is often not well understood, as the current regulatory practice of spatially averaging the data from all monitoring stations blunts the curve, and underestimates the magnitude of threat from the worst affected locations and also during different seasons. “As ozone is a highly reactive gas and even short-term exposure can aggravate respiratory conditions leading to emergency hospital admission, it requires a different approach to risk assessment and communication,” she added. Another expert said that the number of days not meeting the ozone standards is increasing even in winters. “This analysis shows that the number of days not meeting the ozone standards has begun to increase even during winter months, making the winter smog more toxic,” said Avikal Somvanshi, programme manager in CSE’s Urban Lab team of the Sustainable Cities programme. The assessment has traced trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It said that the eight-hourly standard for ground-level ozone exceeded at least in one station in Delhi on 290 days in 2020, which is up by 30 days compared to 2019 and 26 days more than 2018. This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in number of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was an increase by over 300 per cent from previous year. “Noida also registered a 54 per cent jump. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter showing the biggest drop of 28 per cent. Meerut does not have adequate data for 2019 to carry out comparative trend analysis, but with 109 days of exceedance in 2020, it was the least polluted major city in the NCR,” it said. The CSE said that granular real time data (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official online portal Central Control Room for Air Quality Management. “The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread across Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station),” it said. From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. According to the CSE, the city-wide average largely remains within the standard with just occasional exceedances. “But even from this yardstick, the “good” category days (50 per cent below the daily eight-hour concentration standard) have started declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days less than in 2019,” it said. According to location-wise analysis, exceedance of the eight-hour average standard is quite widely distributed in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all the monitors within each reporting area,” it said. The analysis found that ozone build-up is a hyper-local phenomenon as there can be 100 micrograms per cubic metre (µg/m3) difference in ozone levels between two neighbouring stations. “On April 27, 2021 Delhi saw variations as high as 150 µg/m3 between locations. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi showed low ozone levels, south, central, and north Delhi recorded higher levels, south-east Delhi had the highest levels that day. “At the moment, it is not possible to compute the peak pollution in the city as the data that is available from CPCB is capped at 200 µg/m3. This also makes daily AQI reporting ineffective,” said Mr Somvanshi.

Ozone Changing into Extra Widespread In Delhi-NCR Throughout All Seasons: Examine

Ozone, a extremely reactive gasoline and harmful for these affected by respiratory situations and bronchial asthma, is changing into extra widespread in Delhi and the Nationwide Capital Area (NCR) throughout all seasons, in accordance with a brand new evaluation by Centre for Science and Setting (CSE) launched on Friday. The evaluation stated that opposite to the notion that ozone, produced photochemically from interplay between gases within the presence of daylight, is predominantly a summer season phenomenon, the gasoline has emerged as an equally sturdy concern throughout winter as effectively. “Ozone is now a round-the-year drawback requiring pressing consideration of fresh air programmes,” stated CSE govt director Anumita Roychowdhury. “The chance from it’s typically not effectively understood, as the present regulatory apply of spatially averaging the information from all monitoring stations blunts the curve, and underestimates the magnitude of menace from the worst affected places and likewise throughout totally different seasons. “As ozone is a extremely reactive gasoline and even short-term publicity can irritate respiratory situations resulting in emergency hospital admission, it requires a unique strategy to threat evaluation and communication,” she added. One other professional stated that the variety of days not assembly the ozone requirements is growing even in winters. “This evaluation reveals that the variety of days not assembly the ozone requirements has begun to extend even throughout winter months, making the winter smog extra poisonous,” stated Avikal Somvanshi, programme supervisor in CSE’s City Lab group of the Sustainable Cities programme. The evaluation has traced traits throughout totally different seasons – summer season (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It stated that the eight-hourly commonplace for ground-level ozone exceeded at the very least in a single station in Delhi on 290 days in 2020, which is up by 30 days in comparison with 2019 and 26 days greater than 2018. This 12 months has already recorded 169 days of exceedance, a rise of 21 days for a similar interval final 12 months, the evaluation revealed, including that within the NCR, Gurugram noticed the utmost leap in variety of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was a rise by over 300 per cent from earlier 12 months. “Noida additionally registered a 54 per cent leap. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Better Noida noticed a decline, with the latter exhibiting the largest drop of 28 per cent. Meerut doesn’t have ample knowledge for 2019 to hold out comparative pattern evaluation, however with 109 days of exceedance in 2020, it was the least polluted main metropolis within the NCR,” it stated. The CSE stated that granular actual time knowledge (15-minute averages) have been sourced from the Central Air pollution Management Board’s (CPCB) official on-line portal Central Management Room for Air High quality Administration. “The information has been captured from 81 official stations below the Steady Ambient Air High quality Monitoring System (CAAQMS) unfold throughout Delhi-NCR (40 stations in Delhi, 4 every in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Better Noida whereas 20 smaller cities in NCR have one station),” it stated. From this station-level knowledge, the evaluation has calculated the traits when it comes to the variety of days when the every day degree has exceeded the eight-hour commonplace. In line with the CSE, the city-wide common largely stays inside the usual with simply occasional exceedances. “However even from this yardstick, the “good” class days (50 per cent under the every day eight-hour focus commonplace) have began declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days lower than in 2019,” it stated. In line with location-wise evaluation, exceedance of the eight-hour common commonplace is sort of broadly distributed within the metropolis, the CSE stated. “The methodology used right here is in keeping with the USEPA (United States Environmental Safety Company) methodology of contemplating the best focus amongst all of the displays inside every reporting space,” it stated. The evaluation discovered that ozone build-up is a hyper-local phenomenon as there might be 100 micrograms per cubic metre (µg/m3) distinction in ozone ranges between two neighbouring stations. “On April 27, 2021 Delhi noticed variations as excessive as 150 µg/m3 between places. Whereas areas adjoining Yamuna, Lutyen’s Delhi and west Delhi confirmed low ozone ranges, south, central, and north Delhi recorded increased ranges, south-east Delhi had the best ranges that day. “In the meanwhile, it’s not attainable to compute the height air pollution within the metropolis as the information that’s out there from CPCB is capped at 200 µg/m3. This additionally makes every day AQI reporting ineffective,” stated Mr Somvanshi.

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a highly reactive gas and dangerous for those suffering from respiratory conditions and asthma, is becoming more widespread in Delhi and the National Capital Region (NCR) across all seasons, according to a new analysis by Centre for Science and Environment (CSE) released on Friday. The analysis said that contrary to the notion that ozone, produced photochemically from interaction between gases in the presence of sunlight, is predominantly a summer phenomenon, the gas has emerged as an equally strong concern during winter as well. “Ozone is now a round-the-year problem requiring urgent attention of clean air programmes,” said CSE executive director Anumita Roychowdhury. “The risk from it is often not well understood, as the current regulatory practice of spatially averaging the data from all monitoring stations blunts the curve, and underestimates the magnitude of threat from the worst affected locations and also during different seasons. “As ozone is a highly reactive gas and even short-term exposure can aggravate respiratory conditions leading to emergency hospital admission, it requires a different approach to risk assessment and communication,” she added. Another expert said that the number of days not meeting the ozone standards is increasing even in winters. “This analysis shows that the number of days not meeting the ozone standards has begun to increase even during winter months, making the winter smog more toxic,” said Avikal Somvanshi, programme manager in CSE’s Urban Lab team of the Sustainable Cities programme. The assessment has traced trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It said that the eight-hourly standard for ground-level ozone exceeded at least in one station in Delhi on 290 days in 2020, which is up by 30 days compared to 2019 and 26 days more than 2018. This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in number of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was an increase by over 300 per cent from previous year. “Noida also registered a 54 per cent jump. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter showing the biggest drop of 28 per cent. Meerut does not have adequate data for 2019 to carry out comparative trend analysis, but with 109 days of exceedance in 2020, it was the least polluted major city in the NCR,” it said. The CSE said that granular real time data (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official online portal Central Control Room for Air Quality Management. “The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread across Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station),” it said. From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. According to the CSE, the city-wide average largely remains within the standard with just occasional exceedances. “But even from this yardstick, the “good” category days (50 per cent below the daily eight-hour concentration standard) have started declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days less than in 2019,” it said. According to location-wise analysis, exceedance of the eight-hour average standard is quite widely distributed in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all the monitors within each reporting area,” it said. The analysis found that ozone build-up is a hyper-local phenomenon as there can be 100 micrograms per cubic metre (µg/m3) difference in ozone levels between two neighbouring stations. “On April 27, 2021 Delhi saw variations as high as 150 µg/m3 between locations. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi showed low ozone levels, south, central, and north Delhi recorded higher levels, south-east Delhi had the highest levels that day. “At the moment, it is not possible to compute the peak pollution in the city as the data that is available from CPCB is capped at 200 µg/m3. This also makes daily AQI reporting ineffective,” said Mr Somvanshi.

Ozone is becoming more and more prevalent in Delhi-NCR all year round: study

Ozone, a highly reactive and dangerous gas for people with respiratory disorders and asthma, is increasingly spreading in Delhi and the National Capital Region (NCR) in all seasons, according to a new analysis from the Center for Science and Environment (CSE) released Friday. The analysis indicated that contrary to the idea that ozone, photochemically produced from the interaction between gases in the presence of sunlight, is primarily a summer phenomenon, gas has also become an equally concern. strong in winter. “Ozone is now a recurring problem that requires urgent attention from clean air programs,” said CSE Executive Director Anumita Roychowdhury. “The resulting risk is often not fully understood, as the current regulatory practice of spatially averaging data from all monitoring stations blunts the curve and underestimates the magnitude of the threat from the most critical locations. most affected and also during the different seasons. “As ozone is a highly reactive gas and even short-term exposure can worsen respiratory conditions leading to emergency hospitalization, this requires a different approach to risk assessment and communication,” he said. -she adds. See also Rain lashes parts of Delhi-NCR, brings respite from heatwave Another expert said the number of days not meeting ozone standards is increasing even in winter. “This analysis shows that the number of non-ozone-compliant days has started to increase even during the winter months, making winter smog more toxic,” said Avikal Somvanshi, program manager at the team. Urban Lab of the CSE Sustainable Cities program. The assessment plotted trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. He said the eight-hour standard for ground-level ozone exceeded at least one station in Delhi for 290 days in 2020, which is a 30-day increase from 2019 and 26 days more than in 2018. . This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram has seen the number of days of exceedance increase to the maximum between 2019 and 2020 – his 201-day tally in 2020 was an increase of over 300% from the previous year. “Noida also registered a 54% jump. Faridabad saw no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter posting the largest drop of 28%. See also Joburg services disrupted as town faces food shortages Meerut does not have adequate data for 2019 to perform a comparative analysis of trends, but with 109 days exceeding in 2020, it was the least polluted large city in the NCR, “he said. The CSE said the real-time granular data (15-minute average) came from the Central Pollution Control Board’s (CPCB) official online portal, Central Control Room for Air Quality Management. “Data was captured from 81 official stations as part of the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread over Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut and two in Greater Noida while 20 small towns in the NCR have a station), “he said. From this station-level data, the analysis calculated trends in terms of the number of days the daily level exceeded the eight-hour standard. According to the CSE, the city-wide average remains well within the norm with occasional exceedances. “But even in this regard, the ‘good’ category days (50% below the eight-hour daily concentration standard) started to decrease in Delhi. In 2020, Delhi had 115 ‘good’ days, or 24 days. less than in 2019, “he said. See also How Eid al-Adha is celebrated around the world amid COVID-19 restrictions | Radio-Canada According to a location-based analysis, exceeding the eight-hour average standard is fairly widespread in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all monitors in each report area,” he said. he declares. The analysis revealed that the accumulation of ozone is a hyper-local phenomenon as there can be a difference of 100 micrograms per cubic meter (µg / m3) in the ozone levels between two neighboring stations. “On April 27, 2021, Delhi experienced variations of up to 150 µg / m3 between locations. While areas adjacent to Yamuna, Delhi from Lutyen and West Delhi had low levels of ozone, south, central and north Delhi recorded higher levels, southeast Delhi had the highest levels that day. “At the moment, it is not possible to calculate the pollution peak in the city because the data available from the CPCB is capped at 200 µg / m3. This also makes the daily AQI reports ineffective,” Mr. Somvanshi said. .

Ozone becomes more and more prevalent in Delhi-NCR all year round: study

Ozone, a highly reactive and hazardous gas for people with respiratory disorders and asthma, is increasingly spreading in Delhi and the National Capital Region (NCR) in all seasons, according to a new analysis from the Center for Science and Environment (CSE) released Friday. The analysis indicated that contrary to the idea that ozone, photochemically produced from the interaction between gases in the presence of sunlight, is primarily a summer phenomenon, gas has also become an equally concern. strong in winter. “Ozone is now a permanent problem that requires urgent attention from clean air programs,” said CSE Executive Director Anumita Roychowdhury. “The resulting risk is often not fully understood, as the current regulatory practice of spatially averaging data from all monitoring stations blunts the curve and underestimates the magnitude of the threat from the most critical locations. most affected and also during the different seasons. “As ozone is a highly reactive gas and even short-term exposure can worsen respiratory conditions leading to emergency hospitalization, this requires a different approach to risk assessment and communication,” he said. -she adds. See also Assam board exams cash scam unearthed, 2 arrested: police Another expert said the number of days not meeting ozone standards is increasing even in winter. “This analysis shows that the number of non-ozone-compliant days has started to increase even during the winter months, making winter smog more toxic,” said Avikal Somvanshi, program manager at the he Urban Lab team of the CSE Sustainable Cities program. The assessment plotted trends over different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. He said the eight-hour standard for ground-level ozone exceeded at least one station in Delhi for 290 days in 2020, which is a 30-day increase from 2019 and 26 days more than in 2018. . This year has already recorded 169 overshoot days, an increase of 21 days over the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in the number of overshoot days between 2019 and 2020 – his 201-day tally in 2020 was an increase of over 300% from the previous year. “Noida also saw a 54% jump. Faridabad saw no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter posting the largest drop of 28%. See also Security Patrol volunteers rally in San Mateo against anti-Asian crime Meerut does not have adequate data for 2019 to perform a comparative analysis of trends, but with 109 days exceeding in 2020, it was the least polluted large city in the NCR, “he said. The CSE said the real-time granular data (15-minute average) came from the Central Pollution Control Board’s (CPCB) official online portal, Central Control Room for Air Quality Management. “Data was captured from 81 official stations as part of the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread over Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut and two in Greater Noida while 20 small towns in the NCR have a station), ”he said. From this station-level data, the analysis calculated trends in terms of the number of days the daily level exceeded the eight-hour standard. According to the CSE, the city-wide average remains well within the norm with occasional exceedances. “But even in this regard, the ‘good’ category days (50% below the eight-hour daily concentration standard) started to decrease in Delhi. In 2020, Delhi had 115 ‘good’ days, or 24 days. less than in 2019, “he said. See also Rain lashes parts of Delhi-NCR, brings respite from heatwave According to a location-based analysis, exceeding the eight-hour average standard is quite widespread in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all monitors in each report area,” he said. he declares. The analysis revealed that the accumulation of ozone is a hyper-local phenomenon as there can be a difference of 100 micrograms per cubic meter (µg / m3) in the ozone levels between two neighboring stations. “On April 27, 2021, Delhi experienced variations of up to 150 µg / m3 between locations. While areas adjacent to Yamuna, Delhi from Lutyen and West Delhi had low levels of ozone, south, central and north Delhi recorded higher levels, southeast Delhi had the highest levels that day. “At the moment, it is not possible to calculate the pollution peak in the city because the data available from CPCB is capped at 200 µg / m3. This also makes the daily AQI reports ineffective,” said Mr. Somvanshi. .

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a extremely reactive gasoline and harmful for these affected by respiratory circumstances and bronchial asthma, is turning into extra widespread in Delhi and the National Capital Region (NCR) throughout all seasons, in line with a brand new evaluation by Center for Science and Environment (CSE), launched on Friday. The evaluation mentioned that opposite to the notion that ozone, produced photochemically from interplay between gases within the presence of daylight, is predominantly a summer time phenomenon, the gasoline has emerged as an equally sturdy concern throughout winter as effectively. “Ozone is now a round-the-year downside requiring pressing consideration of fresh air packages,” mentioned CSE government director Anumita Roychowdhury. “The danger from it’s usually not effectively understood, as the present regulatory observe of spatially averaging the info from all monitoring stations blunts the curve, and underestimates the magnitude of risk from the worst affected areas and likewise throughout totally different seasons. “As ozone is a extremely reactive gasoline and even short-term publicity can worsen respiratory circumstances resulting in emergency hospital admission, it requires a special strategy to danger evaluation and communication,” she added. Another professional mentioned that the variety of days not assembly the ozone requirements is growing even in winters. “This evaluation reveals that the variety of days not assembly the ozone requirements has begun to extend even throughout winter months, making the winter smog extra poisonous,” mentioned Avikal Somvanshi, program supervisor in CSE’s Urban Lab workforce of the Sustainable Cities programme. The evaluation has traced tendencies throughout totally different seasons – summer time (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It mentioned that the eight-hourly customary for ground-level ozone exceeded at the very least in a single station in Delhi on 290 days in 2020, which is up by 30 days in comparison with 2019 and 26 days greater than 2018. This yr has already recorded 169 days of exceedance, a rise of 21 days for a similar interval final yr, the evaluation revealed, including that within the NCR, Gurugram noticed the utmost bounce in variety of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was a rise by over 300 per cent from earlier yr. “Noida additionally registered a 54 per cent bounce. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida noticed a decline, with the latter displaying the largest drop of 28 per cent. Meerut doesn’t have sufficient knowledge for 2019 to hold out comparative development evaluation, however with 109 days of exceedance in 2020, it was the least main metropolis within the NCR,” it mentioned. The CSE mentioned that granular actual time knowledge (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official on-line portal Central Control Room for Air Quality Management. “The knowledge has been captured from 81 official stations underneath the Continuous Ambient Air Quality Monitoring System (CAAQMS) unfold throughout Delhi-NCR (40 stations in Delhi, 4 every in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida whereas 20 smaller cities in NCR have one station),” it mentioned. From this station-level knowledge, the evaluation has calculated the tendencies when it comes to the variety of days when the day by day stage has exceeded the eight-hour customary. According to the CSE, the city-wide common largely stays inside the usual with simply occasional exceedances. “But even from this yardstick, the “good” class days (50 per cent beneath the day by day eight-hour focus customary) have began declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days lower than in 2019,” it mentioned. According to location-wise evaluation, exceedance of the eight-hour common customary is sort of extensively distributed within the metropolis, the CSE mentioned. “The methodology used right here is in line with the USEPA (United States Environmental Protection Agency) technique of contemplating the very best focus amongst all of the screens inside every reporting space,” it mentioned. The evaluation discovered that ozone build-up is a hyper-local phenomenon as there may be 100 micrograms per cubic meter (µg/m3) distinction in ozone ranges between two neighboring stations. “On April 27, 2021 Delhi noticed variations as excessive as 150 µg/m3 between areas. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi confirmed low ozone ranges, south, central, and north Delhi recorded larger ranges, south-east Delhi had the very best ranges that day. “At the second, it’s not doable to compute the height air pollution within the metropolis as the info that’s out there from CPCB is capped at 200 µg/m3. This additionally makes day by day AQI reporting ineffective,” mentioned Mr Somvanshi.

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a highly reactive gas and dangerous for those suffering from respiratory conditions and asthma, is becoming more widespread in Delhi and the National Capital Region (NCR) across all seasons, according to a new analysis by Centre for Science and Environment (CSE) released on Friday. The analysis said that contrary to the notion that ozone, produced photochemically from interaction between gases in the presence of sunlight, is predominantly a summer phenomenon, the gas has emerged as an equally strong concern during winter as well. “Ozone is now a round-the-year problem requiring urgent attention of clean air programmes,” said CSE executive director Anumita Roychowdhury. “The risk from it is often not well understood, as the current regulatory practice of spatially averaging the data from all monitoring stations blunts the curve, and underestimates the magnitude of threat from the worst affected locations and also during different seasons. “As ozone is a highly reactive gas and even short-term exposure can aggravate respiratory conditions leading to emergency hospital admission, it requires a different approach to risk assessment and communication,” she added. Another expert said that the number of days not meeting the ozone standards is increasing even in winters. “This analysis shows that the number of days not meeting the ozone standards has begun to increase even during winter months, making the winter smog more toxic,” said Avikal Somvanshi, programme manager in CSE’s Urban Lab team of the Sustainable Cities programme. The assessment has traced trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It said that the eight-hourly standard for ground-level ozone exceeded at least in one station in Delhi on 290 days in 2020, which is up by 30 days compared to 2019 and 26 days more than 2018. This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in number of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was an increase by over 300 per cent from previous year. “Noida also registered a 54 per cent jump. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter showing the biggest drop of 28 per cent. Meerut does not have adequate data for 2019 to carry out comparative trend analysis, but with 109 days of exceedance in 2020, it was the least polluted major city in the NCR,” it said. The CSE said that granular real time data (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official online portal Central Control Room for Air Quality Management. “The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread across Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station),” it said. From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. According to the CSE, the city-wide average largely remains within the standard with just occasional exceedances. “But even from this yardstick, the “good” category days (50 per cent below the daily eight-hour concentration standard) have started declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days less than in 2019,” it said. According to location-wise analysis, exceedance of the eight-hour average standard is quite widely distributed in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all the monitors within each reporting area,” it said. The analysis found that ozone build-up is a hyper-local phenomenon as there can be 100 micrograms per cubic metre (µg/m3) difference in ozone levels between two neighbouring stations. “On April 27, 2021 Delhi saw variations as high as 150 µg/m3 between locations. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi showed low ozone levels, south, central, and north Delhi recorded higher levels, south-east Delhi had the highest levels that day. “At the moment, it is not possible to compute the peak pollution in the city as the data that is available from CPCB is capped at 200 µg/m3. This also makes daily AQI reporting ineffective,” said Mr Somvanshi.

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a highly reactive gas and dangerous for those suffering from respiratory conditions and asthma, is becoming more widespread in Delhi and the National Capital Region (NCR) across all seasons, according to a new analysis by Centre for Science and Environment (CSE) released on Friday. The analysis said that contrary to the notion that ozone, produced photochemically from interaction between gases in the presence of sunlight, is predominantly a summer phenomenon, the gas has emerged as an equally strong concern during winter as well. “Ozone is now a round-the-year problem requiring urgent attention of clean air programmes,” said CSE executive director Anumita Roychowdhury. “The risk from it is often not well understood, as the current regulatory practice of spatially averaging the data from all monitoring stations blunts the curve, and underestimates the magnitude of threat from the worst affected locations and also during different seasons. “As ozone is a highly reactive gas and even short-term exposure can aggravate respiratory conditions leading to emergency hospital admission, it requires a different approach to risk assessment and communication,” she added. Another expert said that the number of days not meeting the ozone standards is increasing even in winters. “This analysis shows that the number of days not meeting the ozone standards has begun to increase even during winter months, making the winter smog more toxic,” said Avikal Somvanshi, programme manager in CSE’s Urban Lab team of the Sustainable Cities programme. The assessment has traced trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It said that the eight-hourly standard for ground-level ozone exceeded at least in one station in Delhi on 290 days in 2020, which is up by 30 days compared to 2019 and 26 days more than 2018. This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in number of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was an increase by over 300 per cent from previous year. “Noida also registered a 54 per cent jump. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter showing the biggest drop of 28 per cent. Meerut does not have adequate data for 2019 to carry out comparative trend analysis, but with 109 days of exceedance in 2020, it was the least polluted major city in the NCR,” it said. The CSE said that granular real time data (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official online portal Central Control Room for Air Quality Management. “The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread across Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station),” it said. From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. According to the CSE, the city-wide average largely remains within the standard with just occasional exceedances. “But even from this yardstick, the “good” category days (50 per cent below the daily eight-hour concentration standard) have started declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days less than in 2019,” it said. According to location-wise analysis, exceedance of the eight-hour average standard is quite widely distributed in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all the monitors within each reporting area,” it said. The analysis found that ozone build-up is a hyper-local phenomenon as there can be 100 micrograms per cubic metre (µg/m3) difference in ozone levels between two neighbouring stations. “On April 27, 2021 Delhi saw variations as high as 150 µg/m3 between locations. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi showed low ozone levels, south, central, and north Delhi recorded higher levels, south-east Delhi had the highest levels that day. “At the moment, it is not possible to compute the peak pollution in the city as the data that is available from CPCB is capped at 200 µg/m3. This also makes daily AQI reporting ineffective,” said Mr Somvanshi.

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a extremely reactive fuel and harmful for these affected by respiratory circumstances and bronchial asthma, is changing into extra widespread in Delhi and the National Capital Region (NCR) throughout all seasons, in line with a brand new evaluation by Centre for Science and Environment (CSE) launched on Friday. The evaluation stated that opposite to the notion that ozone, produced photochemically from interplay between gases within the presence of daylight, is predominantly a summer time phenomenon, the fuel has emerged as an equally sturdy concern throughout winter as properly. “Ozone is now a round-the-year downside requiring pressing consideration of unpolluted air programmes,” stated CSE govt director Anumita Roychowdhury. “The threat from it’s typically not properly understood, as the present regulatory apply of spatially averaging the info from all monitoring stations blunts the curve, and underestimates the magnitude of risk from the worst affected places and likewise throughout totally different seasons. “As ozone is a extremely reactive fuel and even short-term publicity can irritate respiratory circumstances resulting in emergency hospital admission, it requires a special strategy to threat evaluation and communication,” she added. Another skilled stated that the variety of days not assembly the ozone requirements is rising even in winters. “This evaluation reveals that the variety of days not assembly the ozone requirements has begun to extend even throughout winter months, making the winter smog extra poisonous,” stated Avikal Somvanshi, programme supervisor in CSE’s Urban Lab crew of the Sustainable Cities programme. The evaluation has traced traits throughout totally different seasons – summer time (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It stated that the eight-hourly normal for ground-level ozone exceeded at the least in a single station in Delhi on 290 days in 2020, which is up by 30 days in comparison with 2019 and 26 days greater than 2018. This 12 months has already recorded 169 days of exceedance, a rise of 21 days for a similar interval final 12 months, the evaluation revealed, including that within the NCR, Gurugram noticed the utmost leap in variety of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was a rise by over 300 per cent from earlier 12 months. “Noida additionally registered a 54 per cent leap. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida noticed a decline, with the latter displaying the most important drop of 28 per cent. Meerut doesn’t have enough information for 2019 to hold out comparative pattern evaluation, however with 109 days of exceedance in 2020, it was the least polluted main metropolis within the NCR,” it stated. The CSE stated that granular actual time information (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official on-line portal Central Control Room for Air Quality Management. “The information has been captured from 81 official stations underneath the Continuous Ambient Air Quality Monitoring System (CAAQMS) unfold throughout Delhi-NCR (40 stations in Delhi, 4 every in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida whereas 20 smaller cities in NCR have one station),” it stated. From this station-level information, the evaluation has calculated the traits when it comes to the variety of days when the every day stage has exceeded the eight-hour normal. According to the CSE, the city-wide common largely stays inside the usual with simply occasional exceedances. “But even from this yardstick, the “good” class days (50 per cent under the every day eight-hour focus normal) have began declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days lower than in 2019,” it stated. According to location-wise evaluation, exceedance of the eight-hour common normal is kind of extensively distributed within the metropolis, the CSE stated. “The methodology used right here is in step with the USEPA (United States Environmental Protection Agency) technique of contemplating the best focus amongst all of the displays inside every reporting space,” it stated. The evaluation discovered that ozone build-up is a hyper-local phenomenon as there could be 100 micrograms per cubic metre (µg/m3) distinction in ozone ranges between two neighbouring stations. “On April 27, 2021 Delhi noticed variations as excessive as 150 µg/m3 between places. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi confirmed low ozone ranges, south, central, and north Delhi recorded increased ranges, south-east Delhi had the best ranges that day. “At the second, it’s not doable to compute the height air pollution within the metropolis as the info that’s out there from CPCB is capped at 200 µg/m3. This additionally makes every day AQI reporting ineffective,” stated Mr Somvanshi.

Ozone Becoming More Widespread In Delhi-NCR Across All Seasons: Study

Ozone, a highly reactive gas and dangerous for those suffering from respiratory conditions and asthma, is becoming more widespread in Delhi and the National Capital Region (NCR) across all seasons, according to a new analysis by Centre for Science and Environment (CSE) released on Friday. The analysis said that contrary to the notion that ozone, produced photochemically from interaction between gases in the presence of sunlight, is predominantly a summer phenomenon, the gas has emerged as an equally strong concern during winter as well. “Ozone is now a round-the-year problem requiring urgent attention of clean air programmes,” said CSE executive director Anumita Roychowdhury. “The risk from it is often not well understood, as the current regulatory practice of spatially averaging the data from all monitoring stations blunts the curve, and underestimates the magnitude of threat from the worst affected locations and also during different seasons. “As ozone is a highly reactive gas and even short-term exposure can aggravate respiratory conditions leading to emergency hospital admission, it requires a different approach to risk assessment and communication,” she added. Another expert said that the number of days not meeting the ozone standards is increasing even in winters. “This analysis shows that the number of days not meeting the ozone standards has begun to increase even during winter months, making the winter smog more toxic,” said Avikal Somvanshi, programme manager in CSE’s Urban Lab team of the Sustainable Cities programme. The assessment has traced trends during different seasons – summer (March-June), winter (October-February) and monsoon (July-September), between 2018 and July 18, 2021. It said that the eight-hourly standard for ground-level ozone exceeded at least in one station in Delhi on 290 days in 2020, which is up by 30 days compared to 2019 and 26 days more than 2018. This year has already recorded 169 days of exceedance, an increase of 21 days for the same period last year, the analysis revealed, adding that in the NCR, Gurugram saw the maximum jump in number of exceedance days between 2019 and 2020 — its tally of 201 days in 2020 was an increase by over 300 per cent from previous year. “Noida also registered a 54 per cent jump. Faridabad recorded no change between 2019 and 2020. Ghaziabad and Greater Noida saw a decline, with the latter showing the biggest drop of 28 per cent. Meerut does not have adequate data for 2019 to carry out comparative trend analysis, but with 109 days of exceedance in 2020, it was the least polluted major city in the NCR,” it said. The CSE said that granular real time data (15-minute averages) have been sourced from the Central Pollution Control Board’s (CPCB) official online portal Central Control Room for Air Quality Management. “The data has been captured from 81 official stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) spread across Delhi-NCR (40 stations in Delhi, four each in Gurugram, Faridabad, Noida and Ghaziabad, three in Meerut, and two in Greater Noida while 20 smaller towns in NCR have one station),” it said. From this station-level data, the analysis has calculated the trends in terms of the number of days when the daily level has exceeded the eight-hour standard. According to the CSE, the city-wide average largely remains within the standard with just occasional exceedances. “But even from this yardstick, the “good” category days (50 per cent below the daily eight-hour concentration standard) have started declining in Delhi. In 2020, Delhi had 115 “good” days, which was 24 days less than in 2019,” it said. According to location-wise analysis, exceedance of the eight-hour average standard is quite widely distributed in the city, the CSE said. “The methodology used here is consistent with the USEPA (United States Environmental Protection Agency) method of considering the highest concentration among all the monitors within each reporting area,” it said. The analysis found that ozone build-up is a hyper-local phenomenon as there can be 100 micrograms per cubic metre (µg/m3) difference in ozone levels between two neighbouring stations. “On April 27, 2021 Delhi saw variations as high as 150 µg/m3 between locations. While areas adjoining Yamuna, Lutyen’s Delhi and west Delhi showed low ozone levels, south, central, and north Delhi recorded higher levels, south-east Delhi had the highest levels that day. “At the moment, it is not possible to compute the peak pollution in the city as the data that is available from CPCB is capped at 200 µg/m3. This also makes daily AQI reporting ineffective,” said Mr Somvanshi.