SmogRank / India / Delhi / Narela
Narela, month by month
Narela has a measured daily mean on 542 days since 19 February 2025. Its worst month was November 2025, at 381 US AQI (265.9 µg/m³), 3rd of 2,715 cities on that month's world ranking. Its cleanest was August 2026, at 88 US AQI (29.0 µg/m³).
Every month since 2025
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Months without a mean, and why
4 months
| Month | Why |
|---|---|
| Oct 2026 | 6 of 12 days measured; a month needs 9. The others: 5 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Feb 2026 | 19 of 28 days measured; a month needs 20. The others: 9 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | 10 of 28 days measured; a month needs 20. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Narela's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| November 2025 | 381265.9 µg/m³ | 3rdof 2,715 | – |
| December 2025 | 316232.9 µg/m³ | 9thof 3,006 | North-western India, December 2025 |
| October 2025 | 191112.8 µg/m³ | 10thof 2,614 | India and Pakistan, October 2025 |
| April 2025 | 184103.1 µg/m³ | 3rdof 2,951 | North-western India and Pakistan, April and May 2025 |
| March 2025 | 17387.2 µg/m³ | 10thof 2,862 | North-western India, 26 to 28 March 2025 North-western India, 10 to 12 March 2025 |
| March 2026 | 17386.7 µg/m³ | 11thof 2,971 | – |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Narela's worst days
| Day | US AQI | Episode |
|---|---|---|
| 14 Dec 2025 | 500+443.0 µg/m³ | North-western India, December 2025 |
| 13 Dec 2025 | 500+427.0 µg/m³ | North-western India, December 2025 |
| 12 Nov 2025 | 500+388.0 µg/m³ | – |
| 11 Nov 2025 | 500+379.0 µg/m³ | – |
| 28 Dec 2025 | 500+344.0 µg/m³ | – |
| 18 Nov 2025 | 500+329.0 µg/m³ | – |
| 23 Nov 2025 | 495323.0 µg/m³ | – |
| 16 Nov 2025 | 483317.0 µg/m³ | – |
| 26 Dec 2025 | 483317.0 µg/m³ | – |
| 20 Dec 2025 | 475313.0 µg/m³ | – |
Daily means, the highest since 19 Feb 2025; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Narela, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/narela/history (accessed 12 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Narela now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).