City air ‘poor’ for 3 days on trot, set to worsen, blame farm fires & wind
Gurgaon: The city's air remained in the ‘poor' category for the third consecutive day. The air quality index (AQI) rose to 226 on Tuesday, while it was recorded at 221 on the previous day. Sector 51 station recorded the highest AQI at 256, followed by Teri Gram (240) and Vikas Sadan (197). No data was available at Gwalpahari monitoring station. According to the System of Air Quality and Weather Forecasting and Research (SAFAR), surface winds with speeds ranging from 4 kmph to 12 kmph are expected in the region for the next six days. The AQI is likely to deteriorate to ‘very poor' in the coming days as the prevailing meteorological conditions and calm winds are unfavourable for the effective dispersion of pollutants. "The AQI is likely to deteriorate to very poor in the coming days since the wind direction is likely to change to north-westerly on Wednesday, the share of stubble burning in Delhi's PM2.5 is predicted to rise to 11% on Wednesday and further to 15% on Thursday. ," said Shubhansh Tiwari, a research associate at the Centre for Science and Environment. So far this year, the state has recorded 655 cases of stubble burning, releasing particulate pollutants. According to CPCB, the annual average permissible limits for PM2.5 and PM10 are 40µg/m³ and 60µg/m³, respectively. On Tuesday, the PM2.5 level was highest in Sector 51 (203 µg/m³), followed by 189 µg/m³ in Teri Gram, and 181 µg/m³ in Vikas Sadan. The level of PM10 was the highest at Sector 51 (221 µg/m³), followed by Teri Gram (211µg/m³). Vikas Sadan doesn't record PM10 data. The share of stubble burning in Delhi's PM2.5 is predicted to rise to 11% on Wednesday and further to 15% on Thursday. According to an analysis by Climate Trends, a think tank, Haryana and Punjab recorded fluctuations in fire incidents between 2019 and 2023, with notable reductions in 2022 and 2023. The think tank's analysis of satellite data on fire incidents in Haryana showed that the fire counts dropped from 14,122 in 2019 to 7,959 in 2023, with fire activity consistently higher between Sept and Dec. While Gurgaon, Mewat, and Jhajjhar showed notable rises, Karnal and Kaithal had approximately 86% and 78% fewer cases of stubble burning, respectively. The report also stated that Delhi's air health was significantly impacted by these fire incidents. On days without fires, the city's AQI averaged 175 (moderate). However, during the same stubble-burning season, AQI increased to 233 (poor), and on days when fires exceeded climatological averages, AQI spiked to 337 (very poor). Meanwhile, Delhi's AQI spiked to 327 on Tuesday, deteriorating from 310 a day earlier, both in the 'very poor' category. No relief is expected from the haze and toxic pollution for the next few days as pollution is predicted to remain in the red category. Tuesday was the foulest day since Feb 14, when AQI was 341. Though the overall AQI remained in the 'very poor' range for the second consecutive day, Anand Vihar exceeded the city average, recording 417 in the ‘severe' category at 4pm to become the most polluted locality in the capital, according to Central Pollution Control Board data.
