First rain makes Mumbai’s air cleaner than Singapore’s | mumbai news | Hindustan Times
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First rain makes Mumbai’s air cleaner than Singapore’s

Mumbai city news: Pollutant measuring indicator, air quality index (AQI, was 48 on Friday, which falls under the ‘good’ category

mumbai Updated: Jun 13, 2017 13:44 IST
Badri Chatterjee
A boy enjoys the rain at Shivaji Park on Friday.
A boy enjoys the rain at Shivaji Park on Friday.(Pratik Chorge/HT Photo)

Overnight showers not only brought down temperatures in Mumbai, but also cleared the air you breathe.

The pollutant measuring indicator — air quality index (AQI) — was 48 on Friday, which falls under the ‘good’ category and was the cleanest air day for the city in 2017 so far. Singapore had an AQI of 55. An AQI of 49 (good) has been predicted for Saturday. The System of Air Quality Weather Forecasting and Research (SAFAR) said AQI levels between 0-50 is ‘good’, 51-100 is ‘satisfactory’, 101- 200 ‘moderate’.

Pollution levels of particulate matter (PM2.5 and PM10), which are small pollutants 2.5 micron to 10 micron in size can enter the respiratory system are the primary cause of pollution problems in Mumbai. As against a safe limit of 60 microgrammes per cubic metre (µg/m3) for PM2.5, Mumbai recorded 28µg/m3. For PM10 the safe limit is 100µg/m3, and the city recorded 46µg/m3.

READ: First showers hit Mumbai, complaints of traffic snarls, water-logging pour in

Officials from SAFAR, which records the AQI levels at 10 locations in the city said Mumbai can expect ‘good’ air quality for the next four months. “As there is a prediction of a normal monsoon, the financial capital can expect relief from pollution till September,” said Gufran Beig, director, SAFAR. “The rain washes away pollutants from the earth’s surface, while strong winds won’t allow pollutants to settle.”

The city and suburbs saw light rain on Friday afternoon. The Colaba weather station recorded 2.2mm of rain, while 0.4 mm rain was recorded at Santacruz. Between 8.30am on Thursday and 8.30am on Friday, the suburbs and south Mumbai recorded moderate rainfall at 26.6 mm and 24 mm rain. Moisture levels was high, with Colaba recording 94% humidity (21% above normal) and Santacruz recording 85% , 14% above normal. Heavy overnight rain reduced the deficit the city facied since the beginning of the month. The weather bureau said light to moderate rain is expected in the weekend. “These are pre-monsoon showers. The southwest monsoon is stable over north Goa and south Konkan,” said a duty officer from IMD.