हवा का हिसाब Hawa Ka Hisab
प्रकाशक श्री अजय माकन, Member of Parliament, Rajya Sabha. सीपीसीबी के सरकारी आँकड़ों का स्वतंत्र विश्लेषण। आँकड़ों का संकलन CREA द्वारा। जागरूकता के उसके प्रयासों के लिए हमारा आभार। इस साइट में CREA की कोई भागीदारी नहीं है। संपर्क: [email protected]

रिपोर्ट · 20 October 2026

307 AQI at Bawana, 24 hours to 4 PM, 20 October 2026, the worst monitor in Delhi today, Very Poor on CPCB's documented formula, and PM2.5 set that figure. 2.7 lakh people live within 4 km of it.

180.1
TODAY
Delhi's AQI calculated with CPCB's documented formula, the mean of 56 stations.
1.16 crore
NEAR POOR OR WORSE
Within 4 km of 15 Poor-or-worse monitors: 51.3 per cent of Delhi, every pollutant counted.
5.4x
THE WHO 24-HOUR LINE
Delhi's PM2.5 today, as measured, against the WHO 24-hour guideline.

आज के कार्ड

11,652,373 people (51.3%) live within 4 km of a station that read PoorWHO सीमा पार — PM2.5 56/56, PM10 56/56 (NAAQS 53)Year to date on 292 matched dates: lower quartile 91 to 107 (unchangedAQI में सबसे ऊँचा — Bawana AQI 307; 4 किमी में 2 लाख 76 हज़ार लोगस्वास्थ्य चेतावनी — CPCB (Moderate)

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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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हिंदी में। अवधि 44 सेकंड।

दिन का सार

Today, 20 October 2026, 24 hours to 4 PM: Delhi's AQI was 180.1, 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 34 sets out the formula). As measured, 44 of the 44 monitors reading PM2.5 were above the WHO 24-hour guideline of 15 µg/m³. Above AQI 200 today: 15 stations, Bawana 307, Jahangirpuri 281, R K Puram 271, NSUT Jaffarpur 263, and 11 more in the station table. Poor or worse air reached 1.16 crore people within 4 km of their monitor today, 51.3 per cent of Delhi.

The year so far, 1 January to 19 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 91.2 on the same dates of 2025. The middle day reads 151.1 against 138.8 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 138 to 179. On the 54 stations that reported on both days, the 95 per cent interval runs 30.7 to 52.2 points.
Against last year: the observed reading
Today 180 across 56 stations. The year is judged on the 37 matched stations: 196 today against 298, the mean of the same date ±7 days of 2025 at those stations. The interval runs -121.3 to -81.3 points.
The worst station in the city today
Very Poor, set by PM2.5. Its PM2.5 averaged 125.7 µg/m³ over the 24 hours to 4 PM, 8.3 times the WHO 24-hour guideline of 15 µg/m³. Last year this station read 350 on the mean of the same date ±7 days, so the change is -42.8 points. 2.7 lakh people live within 4 km of this monitor. Within 500 m of the monitor, 71% of the land is built up and 26% is under vegetation, so this reading describes a densely built neighbourhood.
The year, from its best days to its worst
On the same 292 complete dates, 1 January to 19 October, the best tenth of days reads 75.5 against 72.0 and the worst tenth 287.4 against 289.3. The days at or below 200 went from 211 to 214.
How much of the city was above AQI 200
That is 11.1 of 43.6 reporting stations, against 26.2 per cent over the same dates last year, a change of +0.3 points on an interval of -5.4 to +5.8, 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 44 per cent, and within 500 m only 3.5 per cent. The map holds 55 monitors in 53 zones; 56 monitors reported today. 33 of the 53 zones stretch past our chosen 4 km proximity threshold, informed by US EPA neighbourhood-scale guidance.
What each monitor's reading speaks for
That is 51.3 per cent of Delhi, living around the 15 monitors that read Poor or worse. Bawana was worst at 307, and 2.7 lakh people live within 4 km of it. This counts people near the monitors, not measured individual exposure.
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