He said air quality would continue to remain poor till Friday.The city's air quality has worsened since it recorded an AQI score of 263 (poor) last Friday.SAFAR has forecast an AQI acore of 269 (poor) for Wednesday. Meanwhile, Malad, Andheri and Colaba recorded "poor" levels of PM2.5. A quick glance at the AQI showed that Borivali, Bhandup, BKC, Mazagaon and Navi Mumbai recorded "very poor" air quality with PM2.5 levels at 329, 317, 317, 331 and 322, respectively. According to experts at Indian Institute of Tropical Meteorology, the pollution levels are going to decline from Friday. The number has seen a two-fold jump from 1995. The high moisture level also played culprit as it allows pollutants being trapped close to the surface for a longer period.
"There is a thick sheet of clouds over Mumbai, resulting in obscure sunlight", India Meteorological Department's Deputy Director General (Western Region) K S Hosalikar told PTI. The westerly winds bring in moisture and lead to the formations of clouds. "If there's more sunshine, the heat will reduce the moisture and pollution levels".
He said the slow winds had caused dust particles to remain suspended for a long time over Mumbai and Navi Mumbai.
The United States Environmental Protection Agency (EPA) developed the Air Quality Index to report air quality.
"However, the quality of air will improve during the monsoon season". During Christmas in 2017, the AQI in Mumbai was 258 but a day after Diwali in 2017, Mumbai's AQI was 319 (very poor). The maximum relative humidity level was recorded at 89 per cent for the city, 22 per cent higher than average for the month. Santacruz recorded 21.5 degrees Celsius, 4.3 degrees above normal, and Colaba recorded 23 degrees Celsius, 3.6 degrees above normal, the Hindustan Times reported.
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