रिपोर्ट · 23 August 2026

199 AQI at Anand Vihar, 24 hours to 4 PM, 23 August 2026, the worst monitor in Delhi today, Moderate on CPCB's documented formula, and PM10 set that figure. 13.6 lakh people live within 4 km of it.

100

TODAY, AS MEASURED

Measured on CPCB's documented formula; with the weather removed, the model's 44 stations read 88, against 100 measured.

1.47 crore

NEAR MODERATE OR WORSE

Within 4 km of 20 Moderate-or-worse monitors: 70.3 per cent of Delhi, every pollutant counted.

2.3x

THE WHO 24-HOUR LINE

Delhi's PM2.5 today, as measured, against the WHO 24-hour guideline.

यहाँ के एक्यूआई आँकड़े उसी फ़ॉर्मूले से निकाले गए हैं, जो केंद्रीय प्रदूषण नियंत्रण बोर्ड (CPCB) अपने वायु गुणवत्ता सूचकांक के लिए प्रकाशित करता है। यह फ़ॉर्मूला CPCB ने अपने दस्तावेज़ों में दिया है: CPCB का नोट: एक्यूआई कैसे निकाला जाता है; CPCB का एक्यूआई कैलकुलेटर।
यह रिपोर्ट अंग्रेज़ी में है।

पूरी रिपोर्ट

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दिन का सार

Today, 23 August 2026, 24 hours to 4 PM: worse than last year on the observed index, +14.4 points; with the weather removed, still 1.3 points worse on the model's count. 2 of 3 pollutants, PM2.5, PM10, show no real improvement. Delhi's AQI was 100.2, Satisfactory, calculated with CPCB's documented formula as the mean of 44 stations' AQIs (CPCB's note "How is AQI calculated?" and its AQI Calculator; page 34 sets out the formula). As measured, 43 of the 43 monitors reading PM2.5 were above the WHO 24-hour guideline of 15 µg/m³. 20 of 44 monitors read Moderate or worse on CPCB's documented formula, and 1.47 crore people, 70.3 per cent of Delhi, live within 4 km of one.

The year so far, 1 January to 23 August: the cleaner days of 2026 have been the dirtiest for these dates since 2024, because three days in four read above 112.9 on the particle AQI, against 95.3 on the same dates of 2025. The middle day reads 161.5 against 151.3 on the same dates last year. On an average day, 31.5 per cent of Delhi's reporting monitors, about 13 of 43, sat above 200 on the particle AQI.

निष्कर्ष

रिपोर्ट क्या कहती है

यह रिपोर्ट अंग्रेज़ी में है।

The verdict, both rulers

On the weather model's own count of 36 matched stations, the observed year reads +18.8 points; with the weather removed it reads +1.3 on the model's count; the stations are too mixed to call. 2 of 3 pollutants, PM2.5, PM10, show no real improvement.

Against yesterday: the one-day move

From 83 to 100. On the 44 stations that reported on both days, the 95 per cent interval runs 13.7 to 20.2 points.

Against last year: the observed reading

Today 100 across 44 stations. The year is judged on the 36 matched stations: 103 today against 89, the mean of the same date ±7 days of 2025 at those stations. The interval runs 7.4 to 21.4 points.

The worst station in the city today

Moderate, set by PM10. Its PM10 averaged 252.0 µg/m³ over the 24 hours to 4 PM, 5.6 times the WHO 24-hour guideline of 45 µg/m³. Last year this station read 115 on the mean of the same date ±7 days, so the change is +83.6 points. 13.6 lakh people live within 4 km of this monitor. Within 500 m of the monitor, 84% of the land is built up and 14% is under vegetation, so this reading describes a densely built neighbourhood.

The year, from its best days to its worst

On the same 235 complete dates, 1 January to 23 August, the best tenth of days reads 82.9 against 73.5 and the worst tenth 302.2 against 308.1. The days at or below 200 went from 159 to 157.

How much of the city was above AQI 200

That is 13.1 of 43.2 reporting stations, against 30.0 per cent over the same dates last year, a change of +1.6 points on an interval of -4.3 to +7.9, 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 45 per cent, and within 500 m only 3.6 per cent. Delhi has 55 monitors in 53 zones, of which 44 reported today, and 30 of the 53 zones stretch past 4 km, the distance that the US EPA's neighbourhood scale treats as the furthest a monitor speaks for.

What each monitor's reading speaks for

That is 70.3 per cent of Delhi, living around the 20 monitors that read Moderate or worse. No monitor read Poor or worse today. Anand Vihar was worst at 199, and 13.6 lakh people live within 4 km of it.

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