रिपोर्ट · 17 October 2026

311 AQI at Jahangirpuri, 24 hours to 4 PM, 17 October 2026, the worst monitor in Delhi today, Very Poor on CPCB's documented formula, and PM2.5 set that figure. 11.9 lakh people live within 4 km of it.

162

TODAY

Delhi's AQI calculated with CPCB's documented formula, the mean of 56 stations.

1.21 crore

NEAR POOR OR WORSE

Within 4 km of 14 Poor-or-worse monitors: 58.2 per cent of Delhi, every pollutant counted.

4.9x

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

हिंदी में। अवधि 0 सेकंड।

दिन का सार

Today, 17 October 2026, 24 hours to 4 PM: Delhi's AQI was 162, Moderate, calculated with CPCB's documented formula as the mean of 56 stations' AQIs (CPCB's note "How is AQI calculated?" and its AQI Calculator; page 33 sets out the formula). As measured, 42 of the 44 monitors reading PM2.5 were above the WHO 24-hour guideline of 15 µg/m³. Above AQI 200 today: 14 stations, Jahangirpuri 311, Vivek Vihar 308, Rohini 283, DTU 243, and 10 more in the station table. Poor or worse air reached 1.21 crore people within 4 km of their monitor today, 58.2 per cent of Delhi.

The year so far, 1 January to 16 October: the cleaner days of 2026 have been the dirtiest for these dates since 2019, because three days in four read above 106.7 on the particle AQI, against 89.8 on the same dates of 2025. The middle day reads 149.5 against 136.2 on the same dates last year. On an average day, 26.6 per cent of Delhi's reporting monitors, about 11 of 44, sat above 200 on the particle AQI.

निष्कर्ष

रिपोर्ट क्या कहती है

यह रिपोर्ट अंग्रेज़ी में है।

Against yesterday: the one-day move

From 91 to 163. On the 54 stations that reported on both days, the 95 per cent interval runs 60.3 to 85.5 points.

Against last year: the observed reading

Today 162 across 56 stations. The year is judged on the 37 matched stations: 183 today against 269, the mean of the same date ±7 days of 2025 at those stations. The interval runs -106 to -66.1 points.

The worst station in the city today

Very Poor, set by PM2.5. Its PM2.5 averaged 134.9 µg/m³ over the 24 hours to 4 PM, 8.9 times the WHO 24-hour guideline of 15 µg/m³. Last year this station read 322 on the mean of the same date ±7 days, so the change is -10.7 points. 11.9 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 289 complete dates, 1 January to 16 October, the best tenth of days reads 75.2 against 72.0 and the worst tenth 288.6 against 280.9. The days at or below 200 went from 211 to 211.

How much of the city was above AQI 200

That is 11.1 of 43.5 reporting stations, against 25.6 per cent over the same dates last year, a change of +1.1 points on an interval of -3.9 to +6.1, 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 56 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 58.2 per cent of Delhi, living around the 14 monitors that read Poor or worse. Jahangirpuri was worst at 311, and 11.9 lakh people live within 4 km of it. This counts people near the monitors, not measured individual exposure.

रोज़ाना संग्रह पर वापस