New Delhi, Nov 11: Rainfall in various parts of Delhi-NCR on Friday brought considerable relief from rising air pollution levels, bringing the air quality index (AQI) down from the “severe” category to “very poor” category. However, the overall AQI stood at 339, according to the System of Air Quality and Weather Forecasting and Research (SAFAR) report.
At Anand Vihar station, the air quality was classified in the “poor” category, with PM 2.5 in the “poor” category at 257 and PM 10 in the “moderate” category at 137. On Friday evening, carbon monoxide (CO) was at 45 and nitrogen dioxide (NO2) at 37, both falling in the “satisfactory” category by the Central Pollution Control Board (CPCB).
The AQI scale ranges from zero to 500, ranging from “good” to “severe”. Readings between 301 and 400 fall into the “very poor” category. At Bawana station, PM 2.5 was recorded in the “poor” category at 217, PM 10 in the “moderate” category at 159, and both CO and NO2 were in the “good” category at 42 and 11, respectively.
The Delhi Technical University (DTU) station reported PM 10 at 126 (“moderate”) and PM 2.5 at 83 (“satisfactory”). CO was recorded at 38 and NO2 at 37, both classified as “good”.
In Indira Gandhi International Airport T3 area, the air quality was “moderate”, with PM 2.5 at 171 and PM 10 at 120. CO reached 44, and NO2 reached 21, both classified as “good”.
Jahangirpuri recorded PM 2.5 277 (“poor”), PM 10 148 (“moderate”), CO 42 and NO2 8, both falling in the “good” category.
Punjabi Bagh recorded PM 2.5 at 260 (“poor”) and PM 10 at 135 (“moderate”). NO2 was at 35, which was classified as “good”.
In Noida, the Sector-125 station recorded PM 2.5 at 500 (“severe”), PM 10 at 76 (“satisfactory”), and NO2 at 72, falling in the “satisfactory” category.
Gurugram’s Sector 51 station recorded PM 2.5 155 and PM 10 136, both placed in the “moderate” category. CO was at 104, and NO2 was at 108, both also falling into the “moderate” category.
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