रिपोर्ट · 01 October 2026

244 AQI at IIT Delhi, 24 hours to 4 PM, 01 October 2026, the worst monitor in Delhi today, Poor on CPCB's documented formula, and PM10 set that figure. 6.9 lakh people live within 4 km of it.

165.5

TODAY

Delhi's AQI calculated with CPCB's documented formula, the mean of 44 stations.

1.81 crore

NEAR MODERATE OR WORSE

Within 4 km of 43 Moderate-or-worse monitors: 86.4 per cent of Delhi, every pollutant counted.

4.1x

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, 3.9 MB

दिन का सार

Today, 01 October 2026, 24 hours to 4 PM: Delhi's air today is 50.8 points worse than on this date last year, which is 43.6 per cent higher, and 35.2 points worse than yesterday, on the Central Pollution Control Board's own readings. Delhi's AQI was 165.5, Moderate, 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 33 sets out the formula). Above AQI 200 today: 5 stations, IIT Delhi 244, Pusa (DPCC) 222, Jahangirpuri 212, Bawana 211, and 1 more in the station table. Poor or worse air reached 41.8 lakh people within 4 km of their monitor today, 20.0 per cent of Delhi.

The year so far, 1 January to 1 October: the cleaner days of 2026 have been the dirtiest for these dates since 2019, because three days in four read above 106.1 on the particle AQI, against 90.3 on the same dates of 2025. The middle day reads 149.3 against 135.1 on the same dates last year. On an average day, 27.4 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।

Against yesterday: the one-day move

From 130 to 166. On the 44 stations that reported on both days, the 95 per cent interval runs 30 to 40 points.

Against last year: the observed reading

Today 166 across 44 stations. The year is judged on the 37 matched stations: 167 today against 116, the mean of the same date ±7 days of 2025 at those stations. The interval runs 41.7 to 59.5 points.

The worst station in the city today

Poor, set by PM10. Its PM10 averaged 293.1 µg/m³ over the 24 hours to 4 PM, 6.5 times the WHO 24-hour guideline of 45 µg/m³. 6.9 lakh people live within 4 km of this monitor. Within 500 m of the monitor, 40% of the land is built up and 60% is under vegetation, so this reading describes a mixed neighbourhood.

The year, from its best days to its worst

On the same 274 complete dates, 1 January to 1 October, the best tenth of days reads 74.2 against 72.0 and the worst tenth 291.4 against 293.7. The days at or below 200 went from 198 to 196.

How much of the city was above AQI 200

That is 11.4 of 43.2 reporting stations, against 26.0 per cent over the same dates last year, a change of +1.4 points on an interval of -3.8 to +6.7, 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 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 20.0 per cent of Delhi, living around the 5 monitors that read Poor or worse. IIT Delhi was worst at 244, and 6.9 lakh people live within 4 km of it. On the wider count, 1.81 crore people, 86.4 per cent of Delhi, live within 4 km of a monitor at Moderate or worse.

रोज़ाना संग्रह पर वापस