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Delhi air remains ‘very poor’ but expect a smog-free weekend ahead

delhi Updated: Nov 25, 2016 23:58 IST
Ritam Halder
Ritam Halder
Hindustan Times
air quality,smog

The air quality in the Capital did not see any improvement and remained in the “very poor” category on Friday. The city, however, did not witness any mist or fog and the resulting smog was much better.

The air quality index (AQI) on Friday touched 317 in the “very poor” category. The level of particulate matter PM10 was recorded at 302µgm3 (microgram per cubic metre) while PM2.5 was 142µgm3, according to a 24-hour rolling average calculated by System of Air Quality and Weather Forecasting and Research (SAFAR).

According to a SAFAR advisory, people with heart or lung diseases such as asthma, congestive heart disease or ischemic heart disease were advised to avoid heavy exertion due to the air quality being “very poor”.

PM2.5 and PM10 are ultrafine particulates and the dominant pollutants in Delhi. The 24-hour prescribed standards of PM2.5 and PM10 are 60µgm3 and 100µgm3 respectively and prolonged exposure to anything beyond that harms the respiratory system and may cause cardiac complications.

Forecasts say the pollution levels might remain the same category for the next couple of days at least.

In terms of weather, the mercury level shot up on Friday with the maximum temperature settling at 29.4 degrees Celsius, three notches above normal.

“The minimum temperature was recorded at 14.6 degrees while the maximum settled at 29.4 degrees Celsius, both three notches above normal,” a Met official said.

Humidity levels oscillated between 71 and 32 per cent.

The weatherman has predicted a clear day on Saturday.

“Skies are expected to remain clear during the day. The maximum temperature is likely to hover around 29 degrees Celsius,” the official said.

Even the weather on Sunday will be similar with no forecast of any fog.

First Published: Nov 25, 2016 23:58 IST