New Delhi: Emergency measures had to be undertaken across Delhi-NCR on Saturday evening after air quality levels approached the ‘severe plus’ category.
The Commission for Air Quality Management (CAQM) imposed the strictest anti-pollution restrictions under Stage 4 of the Graded Action Response Plan (GRAP), just hours after GRAP 3 curbs came into effect.
As per official data the Air Quality Index (AQI) dipped from 431 at around 4 pm to 441 by 6 pm, raising concerns that pollution levels could soon breach the ‘severe+’ threshold.
Saturday’s spike was caused
by slow wind speeds, a stable atmosphere, unfavourable meteorological conditions and poor dispersion of pollutants, according to CAQM.
In Anand Vihar, the AQI surged to 488 as dense toxic smog enveloped the area, according to the Central Pollution Control Board.
At India Gate and Kartavya Path, AQI was recorded at 407.
The authorities were quick to press GRAP 4 curbs, under which there is a complete ban on construction and demolition activities.
Authorities also ordered the closure of stone crushers, mining operations and associated activities throughout NCR.
Educational institutions have been advised to shift to hybrid learning modes for up to class V, to reduce exposure of young children to hazardous air.
Transport restrictions are also in effect, with NCR state governments and the government of the National Capital Territory of Delhi instructed to enforce strict curbs on the movement of BS-III petrol and BS-IV diesel light motor vehicles (four-wheelers).