As of Saturday morning, the AQI was in the’very poor’ category at 340, up from the’severe’ category on Friday.According to System of Air Quality and Weather Forecasting and Research (SAFAR) India, the national capital’s air quality fell into the “very poor” category on Saturday morning, with an air quality index (AQI) of 340. Due to favourable weather, Friday evening’s “severe” category AQI of 405, which marked the 12th day this month that Delhi residents had to deal with severe or near-severe air quality levels, has slightly improved.
On Friday, the National Green Tribunal (NGT) noted that some states with declining air quality had not followed through on its previous order for prompt corrective action. Following the Central Pollution Control Board’s online air quality bulletins, the tribunal had earlier sent letters to the chief secretaries of several states, including Delhi, Haryana, Punjab, Rajasthan, Madhya Pradesh, Uttar Pradesh, Maharashtra, Gujarat, Bihar, and Jharkhand.
Based on the AQI, the Graded Response Action Plan (GRAP) divides its measures into four stages: Stage I is ‘Poor’ (AQI 201-300); Stage II is ‘Very Poor’ (AQI 301-400); Stage III is ‘Severe’ (AQI 401-450); and Stage IV is ‘Severe Plus’ (AQI More than 450).
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