Monsoon showers Delhi with four consecutive ‘satisfactory’ air days
NEW DELHI: Delhi witnessed the fourth consecutive ‘satisfactory’ air quality day on Wednesday, making it the longest streak of cleaner air this year. The last time the city saw a cleaner air spell was from October 6 to 11 with four ‘satisfactory’ and two ‘good’ air days. Since monsoon arrived in Delhi on Sunday, the rain has been playing a major role in settling down the pollutants. Central Pollution Control Board’s data shows that the Air Quality Index (AQI) was 93 on Wednesday. The AQI was 169 on June 24 but it improved to 71 on June 25, when monsoon hit the national capital. The AQI has been hovering in the ‘satisfactory’ category with a reading of 93 on Monday and 83 on Tuesday. Several parts of the city have been receiving ‘light’ to ‘moderate’ rain since the arrival of monsoon. Safdarjung, which is the city’s base station, has logged 79.5mm rainfall in June so far. It is the wettest June since 2020. Experts emphasised that rain played a significant role in cleaning the air quality. delhi aqi Anumita Roychowdhury, executive director, research and advocacy, Centre for Science and Environment, said, “Usually monsoon months are the cleanest due to the washout effect of rains. This time too Delhi is experiencing a rainy spell. This has reduced the pollution level.” CPCB data shows that this year has seen seven ‘satisfactory’ air days in June so far. Two such days were seen in May too. From January 1 to June 28, the city has witnessed 15 ‘satisfactory’ air quality days. During the same period, 36 such days in 2020, 11 in 2021 and seven in 2022 were recorded. 2020 was the cleanest period due to lockdown. However, the city has not seen any ‘good’ air day so far. More cleaner days may be recorded if the city witnesses intense rain activity during monsoon, said experts. CPCB classifies an AQI between 0 and 50 as ‘good’, between 51 and 100 ‘satisfactory’, between 101 and 200 ‘moderate’, between 201 and 300 ‘poor’, between 301 and 400 ‘very poor’ and over 400 ‘severe’.
