Dussehra Haze: Delhi Records First ‘Poor’ Air Quality Day of Season
Delhi records its first 'poor' air quality day of the season with AQI surging to 238 following Dussehra celebrations and seasonal weather shifts.
The national capital woke up to a thick blanket of haze on Wednesday morning, marking the first time this season that Delhi air quality index levels have dipped into the "poor" category. This sudden deterioration follows the overnight Dussehra celebrations, leaving residents to grapple with a visible layer of smog engulfing various parts of the city.
The Numbers: A Sharp Spike in Pollution
According to data released by the Central Pollution Control Board (CPCB), the city's Air Quality Index (AQI) climbed to 238 by 10:00 AM on Wednesday. This represents a significant jump of 59 points compared to Tuesday afternoon, when the reading stood at 179.
The pollution was not uniform across the city, with some areas suffering far more than others. Out of 59 monitoring stations, data from 56 showed varying levels of distress. Most alarmingly, two locations crossed the threshold into the "very poor" category:
- Pusa: Registered an AQI of 314
- Jahangirpuri: Registered an AQI of 308
On the other hand, 16 stations, including Anand Vihar, reported air quality that remained within the "moderate" range.
Why the Sudden Decline?
Environmental officials have pointed toward a combination of human activity and nature. While the Dussehra celebrations contributed to the immediate haze, seasonal weather shifts are playing a critical role. Falling temperatures and fluctuating wind speeds have made it difficult for airborne pollutants to disperse, leading to a concentrated accumulation of toxins in the atmosphere.
The CPCB identified Particulate Matter 10 (PM10) as the primary pollutant affecting the city, based on data from 43 active monitoring stations.
Looking Back: A Brief Period of Relief
This spike is the first instance of "poor" air quality since mid-July, when the city recorded AQIs of 261 and 246 on July 12 and 13. For much of October, Delhi had enjoyed relatively better air, largely thanks to light rainfall on October 12 and 16, which helped wash away pollutants.
Recent trends showed a gradual climb:
- October 18: AQI 187
- October 19: AQI 139
- Tuesday (4:00 PM): AQI 179
Understanding the AQI Scale
To put these numbers in perspective, the CPCB categorizes air quality as follows:
- Good: 0 to 50
- Satisfactory: 51 to 100
- Moderate: 101 to 200 (Can cause breathing discomfort for those with heart, lung, or asthma issues)
- Poor: 201 to 300
- Very Poor: 301 to 400
- Severe: 401 to 500
As the winter season approaches, experts warn that Delhi-NCR typically sees a further deterioration in air quality due to a combination of emission sources and stagnant meteorological conditions.