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ದೆಹಲಿ ಗಾಳಿ ಗುಣಮಟ್ಟ ತುಸು ಸುಧಾರಣೆ

ನವದೆಹಲಿ,ಮಾ.೮- ಗಾಳಿಯ ಗುಣಮಟ್ಟದಲ್ಲಿ ಸ್ವಲ್ಪ ಸುಧಾರಣೆ ಕಾಣುವ ಮೂಲಕ ರಾಷ್ಡ್ರ ರಾಜಧಾನಿ ದೆಹಲಿಯಲ್ಲಿ ತುಸು ಸುಧಾರಣೆ ಕಂಡರೆ ದೇಶದ ವಿವಿಧ ಮಹಾನಗರಗಳಲ್ಲಿ ಗಾಳಿಯ ಗುಣಮಟ್ಟ ಕುಸಿಯುತ್ತಿರುವುದು ಆತಂಕ್ಕೆ ಎಡೆ ಮಾಡಿದೆ. ೨೦೨೨-೨೩ ರ ಚಳಿಗಾಲದಲ್ಲಿ ಕೋಲ್ಕತ್ತಾ ಮತ್ತು ಮುಂಬೈ ,ದೆಹಲಿಯ ನಂತರ ಹೆಚ್ಚು ಕಲುಷಿತಗೊಂಡಿವೆ, ಬೆಂಗಳೂರು ಮತ್ತು ಚೆನ್ನೈ ಅಪಾಯಕಾರಿ ಮಾಲಿನ್ಯಕಾರಕ ಮಟ್ಟ ತಲುಪಿವೆ ಎಂದು ವಿಜ್ಞಾನ ಮತ್ತು ಪರಿಸರ ಕೇಂದ್ರ ಹೇಳಿದೆ. ಅಕ್ಟೋಬರ್-ಫೆಬ್ರವರಿ ಅವಧಿಯಲ್ಲಿ ದೇಶದಲ್ಲಿ ಬಿಡುಗಡೆಯಾದ ಸಿಎಸ್ ಇ ವರದಿ ಅನ್ವಯ, ಎಲ್ಲಾ ಮಹಾನಗರಗಳಲ್ಲಿ ವಿವಿಧ ಭೂ-ಹವಾಮಾನ ವಲಯಗಳಲ್ಲಿ ಸ್ಥಳಗಳನ್ನು ವಾಯು ಮಾಲಿನ್ಯ ಸಂಪೂರ್ಣ ಹದಗೆಟ್ಟಿದೆ ಎಂದು ತಿಳಿಸಲಾಗಿದೆ. ದೆಹಲಿಯಲ್ಲಿ ವಾಯು ಮಾಲಿನ್ಯದ ಮಟ್ಟ ಅತ್ಯಧಿಕವಾಗಿದ್ದರೆ, ಉಳಿದ ನಗರಗಳಲ್ಲಿ ಕಳಪೆಯಿಂದ ಕೂಡಿವೆ.ದೆಹಲಿಯನ್ನು ಹೊರತುಪಡಿಸಿದರೆ, ಕೋಲ್ಕತ್ತಾ ಅತಿ ಹೆಚ್ಚು “ಅತ್ಯಂತ ಕಳಪೆ” ದಿನಗಳನ್ನು ಹೊಂದಿದ್ದರೆ, ಮುಂಬೈ ೨೦೨೨-೨೩ರ ಚಳಿಗಾಲದಲ್ಲಿ ಕಡಿಮೆ ಸಂಖ್ಯೆಯ ’ಉತ್ತಮ’ ದಿನಗಳನ್ನು ಹೊಂದಿದೆ. ಬೆಂಗಳೂರು ಮತ್ತು ಹೈದರಾಬಾದ್‌ನಲ್ಲಿ ಚಳಿಗಾಲದ ಗರಿಷ್ಠ ಮಾಲಿನ್ಯ ಕಳೆದ ನಾಲ್ಕು ವರ್ಷಗಳಲ್ಲಿ ಅತ್ಯಂತ ಕೆಟ್ಟದಾಗಿದೆ.”ಇತರ ಬೃಹತ್ ನಗರಗಳಲ್ಲಿ ಹೆಚ್ಚುತ್ತಿರುವ ಚಳಿಗಾಲದ ವಾಯುಮಾಲಿನ್ಯ ಸಾಕಷ್ಟು ಪರಿಣಾಮ ಬೀರಿದೆ ಎಂದು ವರದಿಯಲ್ಲಿ ತಿಳಿಸಿದೆ. ಚಳಿಗಾಲದಲ್ಲಿ ಮಾಲಿನ್ಯದ ಪ್ರಮಾಣ ಹೆಚ್ಚಾಗಿದ್ದು ಅನುಕೂಲಕರವಾದ ಹವಾಮಾನ ಪರಿಸ್ಥಿತಿಗಳನ್ನು ಹೊಂದಿರಬಹುದು, ಆದರೆ ಅವುಗಳ ಒಟ್ಟಾರೆ ನಗರ ಸರಾಸರಿ ಮತ್ತು ಸ್ಥಳಗಳಲ್ಲಿನ ಮಟ್ಟಗಳು ಹೆಚ್ಚಿನ ಮಾನ್ಯತೆಗಳನ್ನು ಉಂಟುಮಾಡಬಹುದು,” ಎಂದು ಸಿಎಸ್‌ಇಯ ಕಾರ್ಯನಿರ್ವಾಹಕ ನಿರ್ದೇಶಕ ಅನುಮಿತಾ ರಾಯ್ ಚೌಧರಿ ಹೇಳಿದ್ದಾರೆ. ಚಳಿಗಾಲದ ಅವಧಿಯಲ್ಲಿ ಅಕ್ಟೋಬರ್ ೧-ಫೆಬ್ರವರಿ ೨೮ರವೆಗೆ ದೆಹಲಿ, ಕೋಲ್ಕತ್ತಾ-ಹೌರಾ, ಮುಂಬೈ, ಹೈದರಾಬಾದ್, ಬಂಗಾಳ ಮತ್ತು ಚೆನ್ನೈಗಳಲ್ಲಿನ ಡೇಟಾದ ವಿಶ್ಲೇಷಣೆಯು ಹಿಂದಿನದಕ್ಕೆ ಹೋಲಿಸಿದರೆ ಐದು ಮಹಾನಗರದಲ್ಲಿ ಈ ಚಳಿಗಾಲದಲ್ಲಿ ಮಾಹಿಯಿ ಸಂಗ್ರಹಿಸಿ ಈ ಮಾಹಿತಿ ಹೊರಹಾಕಲಾಗಿದೆ.

Cse: Bad air getting worse in metros: CSE study | India News

NEW DELHI: Delhi has managed to bend its seasonal pollution curve by recording a slight improvement in air quality but pollution is on the rise in most other mega cities. During 2022-23 winter, Kolkata and Mumbai were the most polluted after the national capital while Bengaluru and Chennai saw the fastest worsening of hazardous pollutant levels, said the Centre for Science and Environment in its analysis of real time particulate matter (PM2.5) data of six cities for October-February period. The CSE report, released on Tuesday, said all mega cities, irrespective of their locations in different geo-climatic zones, faced the challenge of worsening PM2.5 levels during the winter of 2022-23. While levels in Delhi had been the highest, the remaining cities had experienced very poor to worsening trends. Capture 4 Data show if Delhi is excluded, Kolkata had the highest number of “very poor” AQI days while Mumbai had the least number of ‘good’ AQI days in 2022-23 winter. Peak winter pollution in Bengaluru and Hyderabad was the worst in last four years. “The rising winter air pollution in other mega cities does not get adequate attention. These cities located outside the northern plains may have more favourable meteorological conditions to contain the peaking of pollution during winters, but their overall city average and levels across locations can cause very high exposures,” said Anumita Roychowdhury, executive director-research and advocacy, CSE. Analysis of PM2.5 data in Delhi, Kolkata-Howrah, Mumbai, Hyderabad, Bengaluru and Chennai for the winter period (October 1-February 28) shows the five megacities registered higher seasonal PM2.5 average this winter compared to the previous one. This was in contrast to Delhi which registered its least polluted winter compared to previous four winters. The report shows Delhi, with a winter average PM2.5 level of 151 micrograms per cubic meter (g/m³) remains the most polluted mega city. But in the other five mega cities, average PM2.5 levels this winter stood at 84 g/m³ for Kolkata (including Howrah) and 77 g/m³ for Mumbai – both higher than the 24-hour standard for PM2.5. Hyderabad’s winter average of 59 g/m³ was just under the standard. Though Bengaluru with 44 g/m³ and Chennai with 42 g/m³ were under the 24-hour standard, both the cities breeched the annual standard for PM2.5.

2022 winter air in Delhi NCR ‘cleanest’ in five years but ‘toxic’: CSE report

The winter of 2022 was Delhi’s “cleanest” in the last five years, though its air remains “toxic”. The main determinants for the improved air quality were favourable meteorological conditions as well as a reduction in pollution from farm fires, Delhi-based think tank, the Centre for Science and Environment (CSE), said in a report on Monday. The city-wide winter average for Delhi stood at 160 µg/m³ in the winter that spans from October to January. This was the lowest since wide scale monitoring started in 2018-19, and the number refers to PM (particulate matter) 2.5 level, computed by averaging monitoring data from 36 CAAQMS (Continuous Ambient Air Quality Monitoring Stations). PM 2.5 particles are linked to respiratory illnesses and responsible for reducing the quality of life. “This improvement is a combined effect of meteorology and emergency action based on pollution forecasting. There was heavy and extended rainfall in the early phases of the season that prevented smog episodes from building up and also lowered the seasonal average. Despite the decline, Delhi continues to remain the most polluted among the cities and towns of NCR. This downward trend will have to be sustained with much stronger action on vehicles, industry, waste burning, construction, solid fuel and bio mass burning to meet the clean air standard,” the organisation said in a press statement. There was also a decline in peak pollution. This winter, the most polluted day saw the air quality index soar to 401 µg/m³ on November 3 — a five year low. Three of the last five years saw the peak cross 500, with the most being 546 in 2019. To be sure, a value exceeding 400 is still classified as an episode of ‘severe’ pollution. India’s National Ambient Air Quality standards prescribes that the 24-hour PM 2.5 concentration not breach 60 µg/m³. The CSE’s numbers, sourced from the Central Pollution Control Board (CPCB), suggest that a factor behind reduced pollution last winter was a drop in instances of ‘severe pollution’. There were only 10 days when air quality was ‘severe’ or ‘severe+’ — the highest levels of pollution. In comparison, there were 24 such days in 2021, 23 in 2020, 25 in 2019, and 33 in 2018. This winter not only saw a lowering in the quantity and intensity of farm stubble fires but also favourable meteorological conditions that were less conducive for the transport of the smoke. Total smoke that fell upon Delhi in from of PM2.5 has been considerably lesser. CSE estimated that about As many as 4.1 tonnes of PM2.5 fell over Delhi in the ’22 winter in the form of smoke --37 per cent lessethan 6.4 tonne that fell in 2021 and almost half of that in 2020. “The analysis shows that there were still 10 days of severe and severe-plus air quality and one four-day long smog episode during this winter. In the larger NCR, seasonal averages varied considerably among the cities and towns, but high pollution episodes were synchronised despite large distances,” Avikal Somvanshi, senior programme manager, Urban Lab, CSE, said in a statement, “ Delhi and the neighbouring cities of Faridabad, Ghaziabad, Gurugram and Noida were relatively more polluted than other NCR towns, though not significantly. This is the challenge of this landlocked region that demands even stronger action.”

Air pollution level in Delhi-NCR this winter was lowest for season since 2018: CSE

NEW DELHI: According to the latest analysis of air pollution levels by the Centre for Science and Environment (CSE), this winter saw the cleanest air in the Delhi-NCR region since large-scale monitoring started in 2018. The concentration of air pollutants in Delhi stood at 160 micrograms per cubic meter for the October-January period, which is the lowest level recorded since wide-scale monitoring started in 2018-19, the leading think tank said in its report. "The PM2.5 level, computed by averaging monitoring data from 36 Continuous Ambient Air Quality Monitoring Stations (CAAQMS) stations located in the city was 17 per cent lower compared to the seasonal average of 2018-19 winter. Based on the subset of the 10 oldest stations, there is an improvement of almost 20 per cent," the CSE report said. It also said that the number of days with severe or severe-plus air quality was the lowest in the last five years. "This winter, around 10 days had a city-wide average in 'severe' or worse AQI category, which is much lower compared to 24 such days in the previous winter and 33 in the 2018-19 winter," the report said. According to CSE, the city also recorded five days of good air this year which is an improvement over the last winter which had recorded one "good" AQI day, whereas, earlier winters did not record any "good" air quality days. Farm stubble fires this winter were about half of the last winter as the total count of stubble fires reported this year from Punjab, Haryana and Delhi in October and November stood at 55,846 (according to NASA's VIIRS satellite) and 12,158 (according to MODIS satellite) respectively. "These are respectively 36 per cent and 40 per cent lower than the figures for October-January in 2021-22. If the FRP (fire radiative power which is the measure of the intensity of fire) is taken into account in addition to the number of fires, it becomes clear that not only were the fires lesser in count, but also lower in intensity compared to the previous two years," the CSE report said. It also said that fires have been lower between October 2022 and January 2023, both in count and intensity, compared to the previous two seasons, but are marginally higher compared to the 2019-20 season. "The spike seen in the fires since the beginning of the pandemic has ended and the situation has reverted to a pre-pandemic scenario. This is a relatively better scenario, but we are still far from attaining our clean air objectives," the report said. The quantity of smoke from farm stubble fires affecting Delhi is dependent upon two major factors - quantity and intensity of farm stubble fires and meteorological conditions conducive for transportation of the smoke to Delhi. This winter, not only the quantity and intensity of farm stubble fires have been low, but also the meteorological conditions have been less conducive for the transport of the smoke and as a result, the total smoke that fell upon Delhi in the form of PM2.5 has been considerably less. The CSE estimates that about 4.1 tonnes of PM2.5 affected Delhi this winter in the form of smoke, which is 37 per cent less than the 6.4 tonnes last year and almost half of the 2020-21 winter figure. However, the report also mentioned that even though there has been a significant decline in peak pollution levels, air in NCR continues to remain toxic. "In comparison to the other NCR cities, Delhi was the most polluted city followed by Greater Noida this winter. "Among the five big NCR cities, Ghaziabad registered the highest improvement in its winter PM2.5 level with a reduction of 23 per cent compared to the previous winter average. Noida (17 per cent), Faridabad (12 per cent) and Gurugram (6 per cent) also registered improvements in air quality, but it worsened for Greater Noida (-3 per cent)," the CSE analysis report said. About the way forward, the CSE said clean fuels and emissions control systems are needed in the industries. It also said that massive electrification of the vehicle fleet and scaling up of integrated public transport options with vehicle restraint measures are also needed. "The only way to prevent the high peaks and smog episodes during winter is to ensure sustained improvement in air quality to meet the national ambient air quality standard across the region. "This requires region-wide implementation of urban greening and dust control, waste management based on 100 per cent segregation, material recovery and zero landfill policy," the report said. Clean construction and recycling of construction and demolition waste, and replacement of solid fuels in households are some other measures that the CSE suggested to prevent the high peaks of pollution in NCR.

Air pollution level in Delhi-NCR this winter was lowest for season since 2018: CSE

This winter saw the cleanest air in the Delhi-NCR region since large-scale monitoring started in 2018, according to the latest analysis of air pollution levels by the Centre for Science and Environment (CSE). The concentration of air pollutants in Delhi stood at 160 micrograms per cubic meter for the October-January period, which is the lowest level recorded since wide-scale monitoring started in 2018-19, the leading think tank said in its report. “The PM2.5 level, computed by averaging monitoring data from 36 Continuous Ambient Air Quality Monitoring Stations (CAAQMS) stations located in the city was 17 per cent lower compared to the seasonal average of 2018-19 winter. Based on the subset of the 10 oldest stations, there is an improvement of almost 20 per cent,” the CSE report said. Powered By VDO.AI It also said that the number of days with severe or severe-plus air quality was the lowest in the last five years. “This winter, around 10 days had a city-wide average in ‘severe’ or worse AQI category, which is much lower compared to 24 such days in the previous winter and 33 in the 2018-19 winter,” the report said. According to CSE, the city also recorded five days of good air this year which is an improvement over the last winter which had recorded one “good” AQI day, whereas, earlier winters did not record any “good” air quality days. Farm stubble fires this winter were about half of the last winter as the total count of stubble fires reported this year from Punjab, Haryana and Delhi in October and November stood at 55,846 (according to NASA’s VIIRS satellite) and 12,158 (according to MODIS satellite) respectively. “These are respectively 36 per cent and 40 per cent lower than the figures for October-January in 2021-22. If the FRP (fire radiative power which is the measure of the intensity of fire) is taken into account in addition to the number of fires, it becomes clear that not only were the fires lesser in count, but also lower in intensity compared to the previous two years,” the CSE report said. It also said that fires have been lower between October 2022 and January 2023, both in count and intensity, compared to the previous two seasons, but are marginally higher compared to the 2019-20 season. “The spike seen in the fires since the beginning of the pandemic has ended and the situation has reverted to a pre-pandemic scenario. This is a relatively better scenario, but we are still far from attaining our clean air objectives,” the report said. The quantity of smoke from farm stubble fires affecting Delhi is dependent upon two major factors – quantity and intensity of farm stubble fires and meteorological conditions conducive for transportation of the smoke to Delhi. This winter, not only the quantity and intensity of farm stubble fires have been low, but also the meteorological conditions have been less conducive for the transport of the smoke and as a result, the total smoke that fell upon Delhi in the form of PM2.5 has been considerably less. The CSE estimates that about 4.1 tonnes of PM2.5 affected Delhi this winter in the form of smoke, which is 37 per cent less than the 6.4 tonnes last year and almost half of the 2020-21 winter figure. However, the report also mentioned that even though there has been a significant decline in peak pollution levels, air in NCR continues to remain toxic. “In comparison to the other NCR cities, Delhi was the most polluted city followed by Greater Noida this winter. “Among the five big NCR cities, Ghaziabad registered the highest improvement in its winter PM2.5 level with a reduction of 23 per cent compared to the previous winter average. Noida (17 per cent), Faridabad (12 per cent) and Gurugram (6 per cent) also registered improvements in air quality, but it worsened for Greater Noida (-3 per cent),” the CSE analysis report said. About the way forward, the CSE said clean fuels and emissions control systems are needed in the industries. It also said that massive electrification of the vehicle fleet and scaling up of integrated public transport options with vehicle restraint measures are also needed. “The only way to prevent the high peaks and smog episodes during winter is to ensure sustained improvement in air quality to meet the national ambient air quality standard across the region. “This requires region-wide implementation of urban greening and dust control, waste management based on 100 per cent segregation, material recovery and zero landfill policy,” the report said. Clean construction and recycling of construction and demolition waste, and replacement of solid fuels in households are some other measures that the CSE suggested to prevent the high peaks of pollution in NCR. PTI ABU ABU RT RT

NCR records cleanest winter air since 2018: Report

The Centre for Science and Environment (CSE) claimed that this winter has been the cleanest in National Capital Region (NCR) since large-scale air quality monitoring started in 2018. The CSE has carried out the assessment of annual and seasonal trends of particulate matter with with diameters 2.5 micrometer and smaller (PM2.5) for the period October 1 to January 31 in 2018, 2019, 2020, 2021 and 2022. This analysis is based on the real time data available from current working air quality monitoring stations in the NCR. “A comprehensive analysis of PM 2.5 trends during this winter season, October 2022 to January 2023, in the NCR shows a ‘bending of the winter pollution curve and lowering of peak levels’”, the CSE report read. The analysis was conducted by the Urban Lab of the CSE, and has revealed a continuous drop in seasonal average levels of air pollution, although elevated levels prevailed at city stations. The city-wide winter average for Delhi stood at 160 microgram per cubic metre (µg/m³) in the October-January period this year, which is the lowest level recorded since wide-scale monitoring started in 2018-19. Notably, the PM2.5 level computed by averaging monitoring data from 36 CAAQMS stations located in the city was 17 per cent lower compared to the seasonal average of 2018-19 winter. Based on the subset of the 10 oldest stations, there is an improvement of almost 20 per cent. “This improvement is a combined effect of meteorology and emergency action based on pollution forecasting. There was heavy and extended rainfall in the early phases of the season that prevented smog episodes from building up and also lowered the seasonal average. This downward trend will have to be sustained with much stronger action on vehicles, industry, waste burning, construction, solid fuel and biomass burning to meet the clean air standard,” Anumita Roychowdhury, Executive Director (Research), CSE, said. The analysis showed that there were still 10 days of ‘severe’ and ‘severe-plus’ air quality and one four-day long smog episode during this winter, she added. “In the extended NCR, seasonal averages varied considerably among the cities and towns, but high pollution episodes were synchronised despite large distances. Delhi and the neighbouring cities of Faridabad, Ghaziabad, Gurugram and Noida were relatively more polluted than other towns in the region,” Avikal Somvanshi, Senior Programme manager of the Urban Lab, CSE, said.

Delhi has cleanest winter in 5 years, but is most polluted city in NCR: Study

Delhi logged its cleanest winter season in five years with respect to PM2.5 particulates, an analysis by the Centre for Science and Environment (CSE) has revealed. However, among cities in the National Capital Region (NCR), Delhi had the highest concentration of PM2.5 particulates, the study said, while Noida had the lowest. “The city-wide winter average for Delhi stood at 160 micrograms per cubic metre (µg/m³) for the October-January period, which is the lowest level recorded since wide-scale monitoring started in 2018-19. The PM2.5 level, computed by averaging monitoring data from 36 continuous ambient air quality monitoring stations (CAAQMS) located in the city, was 17% lower compared to the seasonal average of 2018-19 winter. Based on the subset of the 10 oldest stations in Delhi, there is an improvement of almost 20%,” the analysis said. In comparison, Delhi’s PM2.5 levels were 171 µg/m³in 2021-22, 186 µg/m³ in 2020-21, 173 µg/m³ in 2019-20 and 193 µg/m³ in 2018-19, the study said. However, this is still considerably higher than the 24-hour standard national ambient air quality standards of 60 µg/m³, or the annual standard of 40 µg/m³. The winter season is the most polluted time of the year, with unfavourable meteorological conditions trapping pollutants close to the surface, including calm winds, low temperature and fog. Anumita Roychowdhury, executive director, research and advocacy at CSE said this winter, the conditions were not as harsh, with Delhi also being aided by emergency-based action based on pollution forecasts.

Air pollution level in Delhi-NCR this winter was lowest for season since 2018: CSE

This winter saw the cleanest air in the Delhi-NCR region since large-scale monitoring started in 2018, according to the latest analysis of air pollution levels by the Centre for Science and Environment (CSE). The concentration of air pollutants in Delhi stood at 160 micrograms per cubic meter for the October-January period, which is the lowest level recorded since wide-scale monitoring started in 2018-19, the leading think tank said in its report. The PM2.5 level, computed by averaging monitoring data from 36 Continuous Ambient Air Quality Monitoring Stations (CAAQMS) stations located in the city was 17 per cent lower compared to the seasonal average of 2018-19 winter. Based on the subset of the 10 oldest stations, there is an improvement of almost 20 per cent," the CSE report said. It also said that the number of days with severe or severe-plus air quality was the lowest in the last five years. "This winter, around 10 days had a city-wide average in 'severe' or worse AQI category, which is much lower compared to 24 such days in the previous winter and 33 in the 2018-19 winter," the report said. According to CSE, the city also recorded five days of good air this year which is an improvement over the last winter which had recorded one "good" AQI day, whereas, earlier winters did not record any "good" air quality days.

Lower average PM2.5 level brings no respite as Delhi is most polluted city

The analysis noted that despite an improvement this winter, pollution levels remained high with the highest average PM2.5 level of 211 µg/m3 for the season recorded at the Nehru Nagar monitoring station. While the average PM2.5 level in Delhi this winter was the lowest from 2018-19 onwards and the city has seen a lower peak level of PM2.5 levels this winter, the national capital was still the most polluted city in the NCR, according to an analysis by the Centre for Science and Environment (CSE). The analysis attributed the improvement to “a combined effect of meteorology and emergency action based on pollution forecasting”. The average PM2.5 level in Delhi from October 1 to January 31 was 160 µg/m3, lower than the 193 µg/m3 recorded over the same period in 2018-19. Last winter, the city recorded a higher average of 171 µg/m3, while the winter of 2020-21 recorded an average of 186 µg/m3 and the average was 173 µg/m3 in the winter of 2019-20. Delhi’s average PM2.5 level this winter was found to be worse than Noida, Greater Noida, Gurgaon, Faridabad and Ghaziabad, and out of 27 NCR towns and cities, Delhi had the highest average PM2.5 level. The peak PM2.5 level this winter was found to be 401 µg/m3, around 26% lower than the highest recorded peak over the past four winters – 546 µg/m3 in 2019-20. The analysis noted that despite an improvement this winter, pollution levels remained high with the highest average PM2.5 level of 211 µg/m3 for the season recorded at the Nehru Nagar monitoring station. Among the pre-identified air pollution ‘hotspots’ in the city, the analysis said that hotspots located in North and East Delhi were the most polluted with Jahangirpuri being the most polluted neighbourhood with an average seasonal PM2.5 level of 201 µg/m3.

Winter air: Delhi's best in 5 years not good enough

NEW DELHI: Despite seeing the least toxic air in the past five years, Delhi was the most polluted major city in NCR with a winter average of 160 micrograms per cubic metre (g/m³), according to a recent analysis by Centre for Science and Environment (CSE). Except R K Puram, all hotspots showed an improvement compared to the average pollution levels recorded over the previous three winters. Track the pollution level in your city "This improvement is a combined effect of meteorology and emergency action based on pollution forecasting. There was heavy and extended rainfall in the early phases of the season that prevented smog episodes from building up and also lowered the seasonal average," said Anumita Roychowdhury, executive director, research and advocacy, CSE.She added, "Despite the decline, Delhi continues to remain the most polluted among the cities and towns of NCR. This downward trend will have to be sustained with much stronger action on vehicles, industry, waste burning, construction, solid fuel and biomass burning to meet the clean air standard." delhi pollution The CSE study revealed hotspots in north and east Delhi to be the most polluted. Jahangirpuri was the 'most polluted' official hotspot with an October-January average PM2.5 level of 201 micrograms per cubic metre. Other most polluted hotspots were Anand Vihar (196 g/m³), Wazirpur (185 g/m³), Mundka (185 g/m³), Rohini (182 g/m³) and Bawana (179 g/m³). Bahadurgarh with 105 g/m³, and Gurgaon and Faridabad each with 133 g/m³ were the least polluted hotspots. RK Puram registered a 1% increase during October-January levels this year than the average of the previous three winters. Wazirpur (5%), Narela (3%), Mayapuri (3%) and Faridabad (3%) registered improvements, but it was less than the improvement noted in Delhi's city-wide average. The PM2.5 level, computed by averaging monitoring data from 36 CAAQMS stations located in the city, was 17% lower compared to the seasonal average of 2018-19 winter. Based on the subset of the 10 oldest stations, there is an improvement of almost 20%. CSE researchers estimate that about 4.1 tonnes of PM2.5 fell over Delhi this winter in the form of smoke, which is 37% less than 6.4 tonnes last year and almost half of the 2020-21 winter figure. "The quantity of smoke from farm fires that falls over Delhi is dependent on two major factors: quantity and intensity of stubble fires, and meteorological conditions conducive for transportation of the smoke to the city. This winter, not only have the quantity and intensity of farm stubble fires been low, but the meteorological conditions have also been less conducive for the transport of the smoke," said the study. The study said the total count of farm stubble fires reported this year from Punjab, Haryana and Delhi in October and November stood at 55,846, according to Nasa's VIIRS satellite, and 12,158, according to its MODIS satellite. These are respectively 36% and 40% lower than the figures for October-January in 2021-22.

This winter was the cleanest in Delhi-NCR since 2018, shows study

A study conducted at Centre for Science and Environment revealed that a comprehensive analysis of PM2.5 trends during the entire winter season (October 2022-January 2023) in Delhi-NCR shows a bending of the winter pollution curve and lowering of peak levels. A study conducted at the Centre for Science and Environment revealed that a comprehensive analysis of PM2.5 trends during the entire winter season (October 2022-January 2023) in Delhi-NCR shows a bending of the winter pollution curve and lowering of peak levels. The winter of 2022-2023 was the cleanest for Delhi-NCR since 2018, when large-scale air quality monitoring started, according to a new analysis by the New Delhi-based non-profit Centre for Science and Environment. Delhi was the most polluted out of all five major NCR cities, CSE found. The analysis was conducted by the Urban Lab at CSE,and has revealed a continuous drop in seasonal average levels of air pollution, although elevated levels prevailed at city stations. This winter has been the cleanest in New Delhi-NCR since large-scale air quality monitoring started in 2018,” said Anumita Roychowdhury, executive director-research and advocacy, Centre for Science and Environment (CSE). A comprehensive analysis of PM2.5 trends during the entire winter season (October 2022-January 2023) in Delhi-NCR shows a “bending of the winter pollution curve and lowering of peak levels, reports CSE. “This improvement is a combined effect of meteorology and emergency action based on pollution forecasting. There was heavy and extended rainfall in the early phases of the season that prevented smog episodes from building up and also lowered the seasonal average. Despite the decline, Delhi continues to remain the most polluted among the cities and towns of NCR. This downward trend will have to be sustained with much stronger action on vehicles, industry, waste burning, construction, solid fuel and biomass burning to meet the clean air standard,” says Roy Chowdhury. “The analysis shows that there were still 10 days of severe and severe-plus air quality and one four-day long smog episode during this winter. In the larger NCR, seasonal averages varied considerably among the cities and towns, but high pollution episodes were synchronised despite large distances. Delhi and the neighboring cities of Faridabad, Ghaziabad, Gurugram and Noida were relatively more polluted than other NCR towns, though not significantly. This is the challenge of this landlocked region that demands even stronger action,” says Avikal Somvanshi, senior programme manager, Urban Lab, CSE.

This Indian City is the Most Polluted in Asia And It’s Not Delhi | Details Here Story by Saurabh Verma • Yesterday 8:37 pm Comments Gandhinagar, Guwahati and Mumbai were among the top ten most polluted cities in Asia on Monday. Accordin

According to the latest data available on the World Air Quality Index (https://aqicn.org), pollution levels touched hazardous levels in GIFT City, Gandhinagar with an air quality index (AQI) of 724, the highest in the list at the time of filing of this report. Gandhinagar was followed by Pan Bazaar, Guwahati (665), Khindipada-Bhandup West, Mumbai (471) and Bhopal Chauraha, Dewas (315).

This Indian City is the Most Polluted in Asia And It’s Not Delhi

Gandhinagar, Guwahati and Mumbai were among the top ten most polluted cities in Asia on Monday. According to the latest data available on the World Air Quality Index (https://aqicn.org), pollution levels touched hazardous levels in GIFT City, Gandhinagar with an air quality index (AQI) of 724, the highest in the list at the time of filing of this report. Gandhinagar was followed by Pan Bazaar, Guwahati (665), Khindipada-Bhandup West, Mumbai (471) and Bhopal Chauraha, Dewas (315). The AQI between 0 and 50 is considered ‘good’, 51-100 ‘Moderate, 101-150 Unhealthy for Sensitive Groups, 151-200 ‘Unhealthy, 201-300 ‘Very Unhealthy’ and 300+ ‘Hazardous’ as per the Air Quality Index scale defined by the US-EPA 2016 standard. Started in 2007, the World Air Quality Index project aims to promote air pollution awareness for citizens and provide unified and worldwide air quality information. Meanwhile, the Centre for Science and Environment (CSE), its latest analysis of air pollution levels, claimed this winter saw the cleanest air in the Delhi-NCR region since large-scale monitoring started in 2018.

राहत की सांस : 5 साल में 20% तक घटा दिल्ली-एनसीआर का प्रदूषण, CSE की रिपोर्ट में खुलासा

सीएसई की रिपोर्ट के मुताबिक वर्ष 2018-19 की सर्दी की तुलना में 2022-23 के जाड़े में 17 से बीस फीसदी तक की कमी आई है। 2018-19 के जाड़े में दिल्ली में प्रदूषण का औसत स्तर 193 रहा था

Air Pollution: एशिया के 10 सबसे प्रदूषित शहरों में दिल्‍ली का नाम नहीं, टॉप पर ये भारतीय शहर

नई दिल्‍ली. अपनी खराब आबोहवा के लिए अक्सर सुर्खियों में रहने वाली दिल्‍ली (New Delhi) इस बार एशिया के टॉप 10 सबसे प्रदूषित (Air Pollution) शहरों की सूची में शामिल नहीं हुई. विश्व वायु गुणवत्ता सूचकांक (Air Pollution AQI Level) के आधार पर सोमवार को उपलब्ध आंकड़ों में चीन से 5, मंगोलिया से 1 और अन्‍य चार शहर भारत से थे. नवीनतम आंकड़ों में गुजरात की राजधानी गांधीनगर (Gandhi nagar) में वायु गुणवत्ता सूचकांक (AQI) 724 के साथ प्रदूषण खतरनाक स्तर तक मापा गया, जो सूची में सबसे अधिक है. इस रिपोर्ट को दाखिल करते समय, गांधीनगर के बाद पान बाजार, गुवाहाटी (665), खिंडीपाड़ा-भांडुप पश्चिम, मुंबई (471) और भोपाल चौराहा, देवास (315) का स्थान रहा. रिपोर्ट में कहा गया है कि इस सर्दी में दिल्‍ली-एनसीआर में हवा, पहले की अपेक्षा बेहतर हुई है और 2018 के बाद इस बार सबसे साफ हवा देखी गई. यूएस-ईपीए 2016 मानक द्वारा परिभाषित इंडेक्स स्केल के अनुसार 0 और 50 के बीच AQI को ‘अच्छा’, 51-100 ‘मध्यम, 101-150 संवेदनशील समूहों के लिए अस्वास्थ्यकर, 151-200’ अस्वस्थ, 201-300 ‘बहुत अस्वस्थ’ और 300+ ‘खतरनाक’ माना जाता है.

सर्दियों में सुधरी दिल्ली की हवा, पांच साल में सबसे कम रहा प्रदूषण

सेंटर फॉर साइंस एंड इनवायरन्मेंट (सीएसई) द्वारा किये गये वायु प्रदूषण के एक हालिया विश्लेषण के अनुसार, 2018 में बड़े पैमाने पर हवा की गुणवत्ता की निगरानी शुरू किये जाने के बाद से इस बार सर्दियों के मौसम में दिल्ली-एनसीआर क्षेत्र में सर्वाधिक स्वच्छ वायु रही। प्रमुख थिंक टैंक ने अपनी रिपोर्ट में कहा कि दिल्ली में वायु प्रदूषकों का सकेंद्रण अक्टूबर-जनवरी अवधि के दौरान 160 माइक्रोग्राम प्रति घन मीटर रहा, जो 2018-19 में व्यापक स्तर पर निगरानी शुरू किये जाने के बाद से न्यूनतम स्तर है। सीएसई की रिपोर्ट में कहा गया है, ‘‘पीएम2.5(हवा में मौजूद 2.5 माइक्रोमीटर से कम व्यास के कण) के स्तर की गणना, शहर में मौजूद 36 वायु गुणवत्ता निगरानी केंद्रों के डेटा का औसत निकाल कर की गई, जो 2018-19 के सर्दियों के मौसमी औसत की तुलना में 17 प्रतिशत कम है। दस सबसे पुराने केंद्रों के आंकड़ों के आधार पर स्थिति 20 प्रतिशत बेहतर हुई है।'' रिपोर्ट के अनुसार, ‘‘इस बार सर्दियों में, करीब 10 दिन शहर भर में एक्यूआई (वायु गुणवत्ता सूचकांक) गंभीर या बहुत खराब श्रेणी में रहा, जो पिछले साल की सर्दियों के 24 दिनों और 2018-19 की सर्दियों के 33 दिनों की तुलना में बहुत कम है।'' सीएसई ने कहा है कि शहर में अच्छी वायु के पांच दिन भी दर्ज किये गये, जो पिछली सर्दियों की तुलना में बेहतर स्थिति है।