Delhi AQI improves to ‘moderate’; probable drizzle in the national capital tomorrow | Latest news Delhi | spcilvly

After two consecutive days of “poor” air, the capital’s pollution levels improved significantly to reach the “moderate” category on Sunday, thanks to a change in wind direction from northwest to southwest, the Meteorological Department said. India. However, weather officials also attributed the improvement in air quality to Stage I of the Graded Response Action Plan (Grap) measures being implemented, when air quality had reached the “poor” mark. on Friday.

Smog in the early hours of Sunday at Kartavya Path in New Delhi.  (Sanchit Khanna/HT Photo)
Smog in the early hours of Sunday at Kartavya Path in New Delhi. (Sanchit Khanna/HT Photo)

An IMD official said the temporary change in wind direction has clouded the skies and raised the night temperature, with the possibility of drizzle in parts of Delhi on Tuesday.

Also read: 12 ways to avoid getting sick from pollution

The 24-hour average air quality index (AQI) was recorded at 164 on Sunday, against 216 (bad) on Saturday, a notable drop of 50 points, according to Central Pollution Control Board (CPCB) data. .

Officials said that although this meant Stage 1 Grap measures could now be removed, the Commission for Air Quality Management (CAQM) said it would not do so, as the implementation of Grap was one of the reasons behind of the improvement in air quality.

Meanwhile, the air quality in the national capital region largely remained in the “moderate” zone on Sunday, except in Greater Noida, which recorded an AQI reading of 249 (poor). Noida recorded 147, Ghaziabad 154 and Gurugram 171 (all moderate), according to CPCB.

“It seems that Phase I of Grap and the control measures have influenced this improvement. Stage I must remain in place to allow such air quality to continue to prevail in the region,” said VK Soni, IMD scientist and part of the CAQM sub-committee implementing Grap.

Twenty-seven measures are included in Stage 1 of the Grap, which was implemented by the CAQM on Friday, including a ban on unregistered construction sites, the adoption of strict measures against visibly polluting vehicles and increased PUC controls, among other things.

The Early Warning System (EWS) forecast for Delhi, a forecast model under the Ministry of Earth Sciences, showed that the ICA is likely to remain in the “moderate” zone until Tuesday, before returning to “poor” status. again on Wednesday.

Before Sunday, Delhi had been recording cold northwesterly winds, which not only helped carry smoke from agricultural fields in Punjab and Haryana, where stubble burning began, but also helped reduce mercury. On Sunday, after a change in wind direction, the minimum temperature increased and was recorded at 23.1 degrees Celsius (°C), two degrees above normal for this time of year. The temperature on Saturday was 20.9°C and the day before was 18.6°C.

Delhi’s maximum was recorded at 36.5°C, two degrees above normal.

“We expect the minimum to remain between 23 and 24°C until Tuesday. Starting Wednesday, the northwest winds will return and the minimums are expected to drop again,” the official said.

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