Delhi Air Quality Plummets To Poor AQI 211, GRAP Stage 1 Measures Enforced

Delhi's air quality has declined to a poor AQI of 211, instigating the implementation of GRAP Stage 1 measures. Residents are advised to limit outdoor activities as smog season returns and pollution levels are expected to fluctuate.

Delhi's air quality has taken a downturn, with the Air Quality Index (AQI) hitting 211, categorised as "poor." This decline prompted authorities to implement Stage 1 of the Graded Response Action Plan (GRAP) across Delhi and the National Capital Region (NCR). The Commission for Air Quality Management (CAQM) initiated these measures in response to rising pollution levels.

On Tuesday morning, Delhi recorded an AQI of 201, marking its first "poor" air day since June 11, when it was at 245. The Early Warning System (EWS) predicts that from October 14 to October 16, the air quality will likely remain in the "poor" category. Over the next six days, pollution levels might vary between "poor" and "very poor."

Smog Season Returns

After enjoying 124 days of cleaner air, Delhi is now facing its annual smog season. According to Central Pollution Control Board (CPCB) data, these days included 77 with "satisfactory" air and 47 with "moderate" air. With monsoon withdrawal, falling temperatures, and stubble burning starting, experts warn of worsening conditions.

The CPCB classifies air quality into six categories: Good (0–50), Satisfactory (51–100), Moderate (101–200), Poor (201–300), Very Poor (301–400), and Severe (401–500). On Monday at 9 a.m., Delhi's AQI was at a moderate level of 169 but rose to 189 by 4 p.m., up from Sunday's reading of 167.

Understanding GRAP Stage 1

Stage 1 of GRAP introduces several measures to curb further deterioration of air quality. These include banning construction and demolition activities that produce visible dust. There are also strict controls on road dust and waste burning. Authorities have intensified mechanical sweeping and water sprinkling on roads while enhancing checks on industrial emissions.

Residents are advised to use public transport and limit outdoor activities during early mornings and late evenings when pollution peaks. These steps aim to mitigate the impact of worsening air conditions as the festive season approaches.

The return of smog highlights the challenges Delhi faces annually due to various factors contributing to pollution. As authorities enforce GRAP Stage 1 measures, residents must adapt their routines to minimise exposure during high pollution periods.