Air quality improved on Saturday but remained in the “poor” category in Noida, Greater Noida, Ghaziabad, Gurugram and Faridabad in the National Capital Region (NCR), according to a government agency.
The presence of PM 2.5 pollutants also remained high in Delhi’s five immediate neighbors, 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 “ moderate ”, 201 and 300 “ bad ”, 301 and 400 ‘”very poor”, and 401 and 500 “severe”.
The 24-hour average AQI at 4 p.m. Saturday was 256 in Gurugram, 246 in Faridabad, 238 in Ghaziabad, 231 in Noida and 228 in Greater Noida, according to the CPCB’s Sameer app.
On Friday it was 325 in Ghaziabad, 306 in Noida, 314 in Greater Noida, 297 in Faridabad and 275 in Gurugram.
CPCB states that an AQI in the “poor” category can cause respiratory discomfort in most people on prolonged exposure, while in the “very low” category it can cause respiratory illness in a. prolonged exposure.
The average AQI on Thursday was 305 in Ghaziabad, 207 in Noida, 315 in Greater Noida, 255 in Faridabad and 284 in Gurugram.
On Wednesday it was 236 in Ghaziabad, 207 in Noida, 228 in Greater Noida, 172 in Faridabad and 141 in Gurugram.
The average AQI on Tuesday was 166 in Ghaziabad, 172 in Faridabad, 178 in Noida, 186 in Greater Noida and 204 in Gurugram.
On Monday, they were 186 in Faridabad, 207 in Ghaziabad, 226 in Greater Noida, 243 in Noida and 246 in Gurugram, which shows a drastic improvement from the day before due to a wave of rain in the NCR.
On Sunday, the average AQI was 448 in Ghaziabad, 441 in Noida, 417 in Greater Noida, 425 in Gurugram and 414 in Faridabad.
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.