Delhi’s Air High quality “Extreme” Once more, Doubtless To Flip Even Worse


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That is the third time in January that the town’s air high quality stood within the “extreme” class. (File)

New Delhi: Delhi’s air high quality turned “extreme” on Thursday because of the prevailing “extraordinarily unfavourable” situations for dispersion of pollution, authorities businesses mentioned.

The town’s 24-hour air high quality index (AQI) was 429. It was 354 on Wednesday, 293 on Tuesday and 243 on Monday.

That is the third time in January that the town’s air high quality stood within the “extreme” class.

The AQI was 441 on January 1 and 443 on January 2. 

An AQI between zero and 50 is taken into account “good”, 51 and 100 “passable”, 101 and 200 “average”, 201 and 300 “poor”, 301 and 400 “very poor”, and 401 and 500 “extreme”.

Kuldeep Srivastava, head of the India Meteorological Division’s regional forecasting centre, mentioned the wind velocity has slowed down and the moisture within the air has made the pollution heavier.

The utmost wind velocity was 10 kmph on Thursday.


The central authorities’s Air High quality Early Warning System for Delhi mentioned sluggish winds and air flow situations are “extraordinarily unfavourable” for dispersion of pollution.

This may result in additional deterioration in air high quality, the company mentioned.

The town’s air flow index — a product of blending depth and common wind velocity – was 2,000 m2/s on Thursday. It’s prone to be 1,000 m2/s on Friday.

Mixing depth is the vertical peak by which pollution are suspended within the air. It reduces on chilly days with calm wind velocity.

A air flow index decrease than 6,000 sqm/second, with the common wind velocity lower than 10 kmph, is unfavourable for dispersal of pollution.

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