रिपोर्ट · 13 September 2026

188 AQI at Wazirpur, 24 hours to 4 PM, 13 September 2026, the worst monitor in Delhi today, Moderate on CPCB's documented formula, and PM10 set that figure. 14.0 lakh people live within 4 km of it.

90.5

TODAY

Delhi's AQI calculated with CPCB's documented formula, the mean of 41 stations.

1.16 crore

NEAR MODERATE OR WORSE

Within 4 km of 14 Moderate-or-worse monitors: 55.4 per cent of Delhi, every pollutant counted.

2.1x

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, 13 September 2026, 24 hours to 4 PM: Delhi's AQI was 90.5, Satisfactory, calculated with CPCB's documented formula as the mean of 41 stations' AQIs (CPCB's note "How is AQI calculated?" and its AQI Calculator; page 32 sets out the formula). As measured, 41 of the 42 monitors reading PM2.5 were above the WHO 24-hour guideline of 15 µg/m³. 14 of 41 monitors read Moderate or worse on CPCB's documented formula, and 1.16 crore people, 55.4 per cent of Delhi, live within 4 km of one.

The year so far, 1 January to 13 September: the cleaner days of 2026 have been the dirtiest for these dates since 2019, because three days in four read above 107.8 on the particle AQI, against 88.2 on the same dates of 2025. The middle day reads 153.9 against 142.8 on the same dates last year. On an average day, 29.1 per cent of Delhi's reporting monitors, about 12 of 43, sat above 200 on the particle AQI.

निष्कर्ष

रिपोर्ट क्या कहती है

यह रिपोर्ट अंग्रेज़ी में है।

Against yesterday: the one-day move

From 75 to 88. On the 39 stations that reported on both days, the 95 per cent interval runs 9.5 to 14.9 points.

Against last year: the observed reading

Today 90 across 41 stations. The year is judged on the 35 matched stations: 92 today against 107, the mean of the same date ±7 days of 2025 at those stations. The interval runs -23.4 to -5.4 points.

The worst station in the city today

Moderate, set by PM10. Its PM10 averaged 228.8 µg/m³ over the 24 hours to 4 PM, 5.0 times the WHO 24-hour guideline of 45 µg/m³. Last year this station read 146 on the mean of the same date ±7 days, so the change is +42.3 points. 14.0 lakh people live within 4 km of this monitor. Within 500 m of the monitor, 91% of the land is built up and 8% is under vegetation, so this reading describes a densely built neighbourhood.

The year, from its best days to its worst

On the same 256 complete dates, 1 January to 13 September, the best tenth of days reads 76.3 against 71.6 and the worst tenth 297.2 against 298.9. The days at or below 200 went from 180 to 178.

How much of the city was above AQI 200

That is 12.1 of 43.2 reporting stations, against 27.6 per cent over the same dates last year, a change of +1.5 points on an interval of -4.0 to +7.0, 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 41 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 55.4 per cent of Delhi, living around the 14 monitors that read Moderate or worse. No monitor read Poor or worse today. Wazirpur was worst at 188, and 14.0 lakh people live within 4 km of it.

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