Pollution levels in Delhi hit 10-day high due to wind movement; situation to persist for at least a day

Pollution levels in Delhi on Wednesday hit a 10-day high, dragging air quality down, with authorities forecasting that the situation will persist for at least a day

PTI November 29, 2017 21:06:58 IST
Pollution levels in Delhi hit 10-day high due to wind movement; situation to persist for at least a day

New Delhi: Pollution levels in Delhi on Wednesday hit a 10-day high, dragging air quality down, with authorities forecasting that the situation will persist for at least a day.

The concentration of suspended particulates PM 2.5 and PM 10 were recorded nearly three times above the prescribed standards even as air quality remained in the 'very poor' category for the sixth straight day.

After rising through the day, PM 2.5 settled at 160 micrograms per cubic metre (ug/m3) and PM 10 at 277 ug/m3 around 7 pm. The corresponding 24-hour safe averages are 60 and 100.

Pollution levels in Delhi hit 10day high due to wind movement situation to persist for at least a day

Representational image. PTI

Dipankar Saha, air lab chief of the Central Pollution Control Board (CPCB), attributed the rise to the influx of moisture due to the change in wind movement to south-westerly and fall in speed of local winds.

The presence of strong local winds helps in flushing out particulates while the presence of moisture traps pollutants near the surface.

"Cloud formation in the northeast and southern India is hindering the flow of wind from the north and northwest. As a result, even winter is not settling in.

"On the other hand, there is an intrusion of humidity from east and southeast. It is likely to cause a spike in air pollutants and also bring down visibility," Saha said.

The CPCB recorded the city's AQI as 334, marginally higher than Tuesday's 307.

The AQI takes into account levels of suspended particulate matter and gases such as nitrogen dioxide and ground-level Ozone.

A "very poor" AQI essentially means that people may suffer from respiratory illness on prolonged exposure to such air. On further dip in air quality, the AQI will turn "severe".

Updated Date:

also read

Delhi Police sends reminder to Twitter to share details of accounts used to circulate 'child pornography' content
News & Analysis

Delhi Police sends reminder to Twitter to share details of accounts used to circulate 'child pornography' content

The Delhi Police has sought details like the links shared on Twitter, accounts used to circulate such content, location and server details from where such content was posted, etc.

Portion of road under IIT-Delhi flyover caves in after heavy rains; traffic diverted
India

Portion of road under IIT-Delhi flyover caves in after heavy rains; traffic diverted

No respite for Delhi as moderate rains are expected to lash the city later in the day. The IMD has already issued a yellow and an orange alert for 1 and 2 August respectively.

COVID-19: Delhi Metro begins train services at 100% capacity; standing not allowed in coaches
India

COVID-19: Delhi Metro begins train services at 100% capacity; standing not allowed in coaches

The DMRC, till Sunday, was running trains with 50 percent seating capacity since 7 June when the services had resumed after a long hiatus