Air Quality 'very poor' in Delhi; heres all you need to know

Modesto Morganelli
Dicembre 7, 2017

The concentration of PM1 (smaller than one micrometre and the most unsafe pollutant) was 45 microgram per cubic metre (µg/m3) in Mumbai in December 2016, against 42µg/m3 in Delhi, found the System of Air Quality Weather Forecasting and Research (SAFAR). Yesterday, Sri Lankan cricketers took to the field here wearing anti-pollution masks. According to scientists and meteorologists, high relative humidity and low wind speed spiked pollution levels in the city.

Pollution is considered severe plus or emergency when readings of PM2.5 and PM10 cross 300 and 500 ug/m3 respectively.

The cleanest air day this year and since air monitoring began in Mumbai was recorded on October 12, when the AQI was 32 (good). While Kanpur was country's most polluted city with an AQI of 371 on Wednesday. Four UP cities figured in the "very poor" air quality category of CPCB on Wednesday. However, it is menacingly close to the "severe" category.

The concentration of particulate matter was well below the safe limit prescribed by the Central Pollution Control Board. AQI in neighbouring city of Vasundhara has also slipped into severe category with the PM 2.5 shooting up to 468. The rest was in the "very poor" zone.

Burgeoning air pollution in New Delhi has evoked anger and embarrassment in equal measure.

However, there are phases, when such spikes are seen even during December and January, mostly due to rapid drop in temperature and high moisture content, factors that trap particulates near the surface. The air quality of Delhi improved by nearly 100 units with AQI 282 on Wednesday as compared to pollution levels on Tuesday when AQI was 378.

Altre relazioniGrafFiotech

Discuti questo articolo

Segui i nostri GIORNALE