Background PM2.5 levels was highest in Mumbai among 6 cities between February and April: Study

Hindustan Times | Oct 17, 2020 at 8:56 PM
  • A study has found that Mumbai recorded the highest background PM2.5 concentration among six Indian cities, between February and April.
  • The level of permanent concentration of PM2.5 was highest for Mumbai at 33 microgrammes per cubic metre (μg/m3) and lowest for Chennai (6 μg/m3).
  • The period of IITM’s study — February 20 to April 14 — covered both pre-lockdown conditions (when human-induced emission sources were present) and those during lockdown.