Delhi Chokes as Air Quality Plunges into 'Severe' Category; AQI Hits 483
Delhi's air quality plunges into the 'severe' category with an AQI of 483. Stage III GRAP measures are now in effect across Delhi-NCR.
The national capital woke up to a suffocating blanket of smog on Sunday morning as Delhi air quality severe levels took hold, with the overall Air Quality Index (AQI) skyrocketing to 483. According to data released by the Central Pollution Control Board (CPCB), the city has slipped from the 'very poor' category recorded on Saturday morning—where the AQI stood at 364—into the dangerous 'severe' zone.
Hotspots of Pollution: Which Areas are Worst Hit?
The deterioration was not uniform across the city, with several neighborhoods recording alarmingly high pollution levels. Multiple areas crossed the 400-mark, placing them firmly in the 'severe' category. The most affected zones included:
- Punjabi Bagh: 449
- RK Puram: 448
- Bawana: 446
- IIT Delhi and Rohini: 445 each
- Patparganj: 421
- Chandni Chowk: 420
- Alipur: 413
Other prominent locations remained in the 'very poor' category, with India Gate recording an AQI of 398, Narela at 395, Akshardham Temple at 336, and Anand Vihar at 328.
GRAP Stage III Invoked: What This Means for Residents
In response to the plummeting air quality and the onset of winter, the Commission for Air Quality Management (CAQM) invoked Stage III of the Graded Response Action Plan (GRAP) on Friday. This move came two days before Diwali as a precautionary measure based on forecasts from the India Meteorological Department (IMD) and the Indian Institute of Tropical Meteorology (IITM).
The emergency action plan is not limited to the capital but extends across Delhi and adjoining districts of Rajasthan, Uttar Pradesh, and Haryana. Under the Stage III restrictions, the following measures are now in effect:
- Vehicle Bans: BS-III petrol and BS-IV diesel four-wheelers are prohibited from plying in Delhi and designated NCR districts.
- Commercial Restrictions: Tighter rules have been imposed on older light and medium goods vehicles, as well as diesel commercial vehicles not registered in Delhi.
- Construction Halt: All non-essential construction activities that generate dust have been stopped.
- Education Shifts: Hybrid learning arrangements have been introduced for primary school students to reduce exposure to toxic air.
Understanding the AQI Scale
The CPCB uses a specific scale to categorize the health risks associated with air quality. The current jump to 483 places Delhi near the top of the 'severe' bracket:
- Good: 0–50
- Satisfactory: 51–100
- Moderate: 101–200
- Poor: 201–300 (Triggers GRAP Stage I)
- Very Poor: 301–400 (Triggers GRAP Stage II)
- Severe: 401–500 (Triggers GRAP Stage III)
If the pollution levels continue to climb and exceed 450, the city may enter the 'severe plus' category, triggering GRAP Stage IV. This final stage involves even more drastic measures, including restrictions on heavy goods vehicles and emergency interventions targeting industrial and traffic-related pollution.
A Hazy Start to Winter
The combination of falling temperatures and stagnant winds has trapped pollutants close to the ground. Residents reported a thick layer of haze on Sunday morning, which significantly reduced visibility and increased health concerns for those living in the most affected regions of the NCR.