Chandni Chowk air quality · Delhi, Delhi NCR
This level threatens health across the whole population
US AQI 664 (Hazardous) at the IITM monitor in Chandni Chowk, Delhi, the 5th highest of 81 Delhi NCR monitors reporting. India's official NAQI (CPCB) 465 (Severe). Main pollutant: PM2.5.
Updated
Last 24 hours: worst 1297 at 3 am yesterday, best 205 at 2 pm yesterday (US AQI)
Pollutants at Chandni Chowk
- PM2.5 · µg/m³40827.2× WHO limit
- PM10 · µg/m³67114.9× WHO limit
- NO₂ · µg/m³29.6Under WHO limit
- O₃ · µg/m³28.0
- SO₂ · µg/m³30.3Under WHO limit
- CO · mg/m³2.65
This hour's readings at this monitor. WHO multiples use the 2021 24-hour guidelines.
Where Chandni Chowk ranks in Delhi NCR
- 5thmost polluted of 81 Delhi NCR monitors right now
- 13thof 68 NCR monitors, 6 to 19 October 2026 (average NAQI 185)
- 242average US AQI, last 30 days
- 325Delhi's city figure now
In our study of every Delhi NCR monitor from 6 to 19 October 2026, Chandni Chowk ranked 13th of 68 and 8th of 45 in Delhi, with a mean daily NAQI (CPCB's index) of 185, against 150 in mid-September. Its daily NAQI was above 200 (Poor) on 5 of the 14 days. See the full ranking.
Most polluted right now: Sector 110 932 · Sector 39 824 · Teri Gram 677 · North Campus, DU 665 · Chandni Chowk 664.
Is it safe outside in Chandni Chowk right now?
Health warning of emergency conditions: everyone is more likely to be affected.
Walking and commuting
AvoidStay indoors. Postpone non-essential trips.
Running and jogging
AvoidSkip strenuous exercise, even indoors if the air inside is not filtered.
Cycling
AvoidAvoid riding outdoors.
Children playing outside
AvoidKeep children indoors in a room with filtered air.
Older adults and heart or lung conditions
AvoidStay indoors with filtered air and seek care if symptoms appear.
Open windows
AvoidSeal gaps around doors and windows if you can.
Mask outdoors
EssentialN95 or FFP2 mask essential outdoors.
Air purifier indoors
EssentialRun a HEPA purifier on high in a closed room.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
When the air is worst in Chandni Chowk
Last 7 days, India timeOver the last 7 days, the air at this monitor was worst from 8 pm to 11 pm (average US AQI 513) and cleanest from 2 pm to 5 pm (221). Plan walks, runs and open windows for the cleaner hours.
Chandni Chowk air quality, last 24 hours
Hourly US AQI, 20 of 24 hours, India timeIn the last 24 hours the US AQI at this monitor was highest at 3 am yesterday (1297, Hazardous) and lowest at 2 pm yesterday (205, Very Unhealthy).
Chandni Chowk air quality, last 30 days
Daily average, 25 days- 242average US AQI
- 490worst day, 8 November
- 119cleanest day, 12 October
- 21days above 150 (Unhealthy or worse)
Nearby monitors
All of DelhiThe most polluted areas of Delhi NCR, ranked →
Chandni Chowk air quality: common questions
What is the AQI in Chandni Chowk right now?
The US AQI at the IITM monitor in Chandni Chowk, Delhi is 664 (Hazardous), the 5th highest of 81 Delhi NCR monitors reporting. Over the last 24 hours it ranged from 205 (2 pm yesterday) to 1297 (3 am yesterday). The main pollutant is PM2.5. The same air reads India's official NAQI (CPCB) 465 (Severe).
What time is the air worst in Chandni Chowk?
Over the last 7 days, from 8 pm to 11 pm India time, when the monitor averaged 513. The cleanest stretch was 2 pm to 5 pm, at 221.
Is Chandni Chowk one of the most polluted areas in Delhi NCR?
From 6 to 19 October 2026, Chandni Chowk ranked 13th of 68 Delhi NCR monitors by mean daily NAQI, CPCB's index (185), and 8th of 45 in Delhi. Right now it is 5th of 81. See the full ranking.
How has Chandni Chowk's air been over the last 30 days?
The monitor averaged a US AQI of 242 over 25 days with data. The worst day was 8 November at 490 and the cleanest 12 October at 119. 21 days were above 150 (Unhealthy or worse).
Where does Chandni Chowk's air quality data come from?
From the continuous monitoring station run by the Indian Institute of Tropical Meteorology (IITM) in CPCB's national network. Good Air shows the US EPA AQI worked out from those readings, and CPCB's own National Air Quality Index (NAQI) beside it. Good Air does not estimate or adjust the readings.
Source: Indian Institute of Tropical Meteorology (IITM), via CPCB's national monitoring network. One monitor shows the air around it, which can differ from a few streets away. Readings are published by the monitoring agency and may be revised.