# Air quality fluctuations in Delhi-NCR

> Live situation record from CLSTR: https://clstr.news/situations/air-quality-fluctuations-in-delhi-ncr
> Updated: 2026-09-22T03:57:28.000Z. Sources: 3. Developments: 2.

In late August, a shift in the monsoon trough brought heavy rainfall and strong winds to 23 Indian states, including the Delhi-NCR region. This precipitation led to a significant improvement in air quality; in Delhi, the Air Quality Index (AQI) reached satisfactory levels, with some areas recording an AQI as low as 20.

By late September, air pollution levels began rising across the Delhi-NCR region following the cessation of rainfall. With clear skies and stable temperatures forecasted, pollutants have accumulated. In Greater Noida, the AQI in Knowledge Park-5 reached 330, categorized as ‘very poor’. Elevated pollution levels were also reported by the Delhi Pollution Control Committee (DPCC) in areas such as Chandni Chowk, Anand Vihar, and Bawana, while Ghaziabad also experienced deteriorating air quality.

## Claims

- The India Meteorological Department forecasts no significant weather changes in the Delhi-NCR region for the coming days. (corroborated by 3 sources)
- The sky is expected to remain mainly clear from September 22 to September 24. (corroborated by 3 sources)
- Maximum temperatures are expected to range between 34 and 35 degrees Celsius during the period of September 22 to 24. (corroborated by 3 sources)
- The Air Quality Index (AQI) in the Knowledge Park-5 area of Greater Noida reached 330, categorizing it as ‘very poor’. (corroborated by 3 sources)
- The Delhi Pollution Control Committee reported an AQI of 235 in Chandni Chowk. (corroborated by 3 sources)
- In Ghaziabad, the AQI in Loni was recorded at 203. (corroborated by 3 sources)

## Timeline

### 2026-09-22: Delhi-NCR air pollution rises as rainfall ceases

Air pollution is increasing in Delhi-NCR as rainfall stops and skies clear. Greater Noida's Knowledge Park-5 has reached a ‘very poor’ AQI of 330, while several areas in Delhi and Ghaziabad report high levels.

3 sources. https://clstr.news/cluster/delhi-ncr-air-pollution-rises-as-rainfall-ceases

### 2026-08-26: Monsoon rains improve air quality across 23 Indian states

Heavy monsoon rains across 23 Indian states, including Delhi-NCR, have significantly improved air quality and provided relief from heat, though weather alerts remain in place.

2 sources. https://clstr.news/cluster/monsoon-rains-improve-air-quality-across-23-indian-states

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Cite as: Air quality fluctuations in Delhi-NCR. CLSTR, https://clstr.news/situations/air-quality-fluctuations-in-delhi-ncr