India, Nov. 28 -- The civic administration has begun to take emergency measures to contain Mumbai's worsening air quality by implementing the Graded Response Action Plan-4 (GRAP-4) in the worst-affected areas in the city.

The move follows a steady deterioration in Mumbai's air quality through November, with many pockets consistently recording "poor" on the Air Quality Index (AQI) as the city remains shrouded in a haze it can't seem to shake off.

While Mumbai's overall AQI was 173 on Thursday, or "moderate", six of the 21 AQI monitoring stations recorded "poor" AQI. Pockets that have consistently registered "poor" AQI in November, and occasionally slipped into the "very poor" band (AQI of over 300), include Mazgaon, Malad and Deonar.

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