Report · 04 November 2026

500 AQI at Jahangirpuri, 24 hours to 4 PM, 04 November 2026, the worst monitor in Delhi today, Severe on CPCB's documented formula, and PM10 set that figure. 12.5 lakh people live within 4 km of it.

390.4

TODAY

Delhi's AQI calculated with CPCB's documented formula, the mean of 59 stations.

2.09 crore

NEAR POOR OR WORSE

Within 4 km of 59 Poor-or-worse monitors: 92.1 per cent of Delhi, every pollutant counted.

The AQI figures here are calculated with the formula that the Central Pollution Control Board (CPCB) publishes for its air quality index. CPCB's own documents set out that formula: CPCB's note on how the AQI is calculated; CPCB's AQI calculator.

The full report

The complete written report for this day, with every figure and the source it comes from.

Download the daily reportPDF, 3.4 MB

The day in brief

Delhi's AQI was 390.4, Very Poor, calculated with CPCB's documented formula as the mean of 59 stations' AQIs (CPCB's note "How is AQI calculated?" and its AQI Calculator; page 22 sets out the formula). Above AQI 200 today: 59 stations, Jahangirpuri 500, Mundka 500, Alipur 500, IIT Delhi 500, and 55 more in the station table. Poor or worse air reached 2.09 crore people within 4 km of their monitor today, 92.1 per cent of Delhi.

The year so far, 1 January to 3 November: the cleaner days of 2026 have been the dirtiest for these dates since 2019, because three days in four read above 107.4 on the particle AQI, against 94.1 on the same dates of 2025. The middle day reads 156.2 against 144.9 on the same dates last year. On an average day, 27.9 per cent of Delhi's reporting monitors, about 12 of 44, sat above 200 on the particle AQI.

The findings

What the report says

Against yesterday: the one-day move

From 366 to 390. On the 57 stations that reported on both days, the 95 per cent interval runs 17.7 to 30.8 points.

Against last year: the observed reading

Today 390 across 59 stations. The year is judged on the 39 matched stations: 407 today against 339, the mean of the same date ±7 days of 2025 at those stations. The interval runs 52.4 to 83.5 points.

The worst station in the city today

Severe, set by PM10. Last year this station read 385 on the mean of the same date ±7 days, so the change is +115.2 points. 12.5 lakh people live within 4 km of this monitor. Within 500 m of the monitor, 92% of the land is built up and 7% is under vegetation, so this reading describes a densely built neighbourhood.

The year, from its best days to its worst

On the same 307 complete dates, 1 January to 3 November, the best tenth of days reads 76.4 against 72.5 and the worst tenth 291.2 against 316.7. The days at or below 200 went from 211 to 219.

How much of the city was above AQI 200

That is 12.1 of 44.3 reporting stations, against 29.6 per cent over the same dates last year, a change of -1.7 points on an interval of -8.8 to +4.7, so it is unchanged inside its margin.

Who the monitoring network reaches

Within 4 km live 92 per cent of Delhi's people, within 2 km 44 per cent, and within 500 m only 3.5 per cent. The map holds 55 monitors in 53 zones; 59 monitors reported today. 33 of the 53 zones stretch past our chosen 4 km proximity threshold, informed by US EPA neighbourhood-scale guidance.

What each monitor's reading speaks for

That is 92.1 per cent of Delhi, living around the 59 monitors that read Poor or worse. Jahangirpuri was worst at 500, and 12.5 lakh people live within 4 km of it. This counts people near the monitors, not measured individual exposure.

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