![]() ![]() The PM10 levels crossed the 500 micrograms per cubic metre mark around 5 am on Friday and stood at 511 micrograms per cubic metre at 9 am.Īccording to the Graded Response Action Plan (GRAP), the air quality is considered to be in the ?emergency? category if PM2.5 and PM10 levels continue to be above 300 micrograms per cubic metre and 500 micrograms per cubic metre, respectively, for 48 hours or more.
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