रिपोर्ट · 09 October 2026

246 AQI at Dwarka-Sector 8, 24 hours to 4 PM, 09 October 2026, the worst monitor in Delhi today, Poor on CPCB's documented formula, and PM10 set that figure. 8.0 lakh people live within 4 km of it.

178

TODAY, AS MEASURED

Measured on CPCB's documented formula; with the weather removed, the model's 44 stations read 117, against 178 measured.

1.84 crore

NEAR MODERATE OR WORSE

Within 4 km of 47 Moderate-or-worse monitors: 88.2 per cent of Delhi, every pollutant counted.

5.1x

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

इस दिन की पूरी लिखित रिपोर्ट, हर आँकड़े और उसके स्रोत के साथ।

रोज़ की रिपोर्ट डाउनलोड करेंPDF, 4.0 MB

दिन का सार

Today, 09 October 2026, 24 hours to 4 PM: worse than last year on the observed index, +32.1 points; with the weather removed, still 0.9 points worse on the model's count. 1 of 3 pollutants, PM10, show no real improvement. Delhi's AQI was 177.9, Moderate, calculated with CPCB's documented formula as the mean of 48 stations' AQIs (CPCB's note "How is AQI calculated?" and its AQI Calculator; page 34 sets out the formula). Above AQI 200 today: 12 stations, Dwarka-Sector 8 246, R K Puram 238, Punjabi Bagh 238, NSUT Jaffarpur 237, and 8 more in the station table. Poor or worse air reached 85.9 lakh people within 4 km of their monitor today, 41.0 per cent of Delhi.

The year so far, 1 January to 9 October: the cleaner days of 2026 have been the dirtiest for these dates since 2018, because three days in four read above 106.7 on the particle AQI, against 88.8 on the same dates of 2025. The middle day reads 153.3 against 134.3 on the same dates last year. On an average day, 27.0 per cent of Delhi's reporting monitors, about 11 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 37 matched stations, the observed year reads +36.6 points; with the weather removed it reads +0.9 on the model's count; the stations are too mixed to call. 1 of 3 pollutants, PM10, show no real improvement. With the weather removed, 20 of the model's 37 matched stations read higher than last year.

Against yesterday: the one-day move

From 162 to 177. On the 43 stations that reported on both days, the 95 per cent interval runs 8.1 to 22.8 points.

Against last year: the observed reading

Today 178 across 48 stations. The year is judged on the 37 matched stations: 182 today against 150, the mean of the same date ±7 days of 2025 at those stations. The interval runs 17.5 to 45.8 points.

The worst station in the city today

Poor, set by PM10. Its PM10 averaged 291.9 µg/m³ over the 24 hours to 4 PM, 6.4 times the WHO 24-hour guideline of 45 µg/m³. Last year this station read 196 on the mean of the same date ±7 days, so the change is +49.6 points. 8.0 lakh people live within 4 km of this monitor. Within 500 m of the monitor, 65% of the land is built up and 34% is under vegetation, so this reading describes a densely built neighbourhood.

The year, from its best days to its worst

On the same 282 complete dates, 1 January to 9 October, the best tenth of days reads 74.8 against 71.9 and the worst tenth 290.7 against 286.4. The days at or below 200 went from 206 to 204.

How much of the city was above AQI 200

That is 11.3 of 43.3 reporting stations, against 25.3 per cent over the same dates last year, a change of +1.7 points on an interval of -3.2 to +6.9, 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 48 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 41.0 per cent of Delhi, living around the 12 monitors that read Poor or worse. Dwarka-Sector 8 was worst at 246, and 8.0 lakh people live within 4 km of it. On the wider count, 1.84 crore people, 88.2 per cent of Delhi, live within 4 km of a monitor at Moderate or worse.

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