Air quality remained in the “very poor” category in Gurugram. (File)
Noida:
Air quality remained “severe” in Noida, Greater Noida, Ghaziabad and Faridabad, as it improved to the “very poor” category in Gurugram in the National Capital Region (NCR) on Friday , according to a government agency.
The concentration of the main air pollutants PM 2.5 and PM 10 also remained high in the five cities neighboring Delhi, according to the Air Quality Index (AQI) maintained by the Central Pollution Control Board (CPCB).
According to the index, an AQI between zero and 50 is considered “good”, 51 and 100 “satisfactory”, 101 and 200 “average”, 201 and 300 “bad”, 301 and 400 “very bad” and 401 and 500 ” severe ”.
The 24-hour average AQI at 4 p.m. on Friday was 433 in Ghaziabad, 421 in Greater Noida, 415 in Faridabad, 406 in Noida and 392 in Gurugram, according to the CPCB’s Sameer app.
It was 464 in Ghaziabad, 457 in Greater Noida, 450 in Noida, 443 in Gurugram and 416 in Faridabad on Thursday.
PM 2.5 and PM 10 were the main pollutants in these satellite cities of Delhi, where the average AQI remained at 406 on Friday, according to the app.
CPCB states that an AQI of the “severe” category affects healthy people and seriously affects those with existing illnesses.
The AQI for each city is based on the average value of all the stations there. Noida, Faridabad and Ghaziabad have four stations each, while Gurugram has three and Greater Noida two, depending on the app.
