SmogRank / India / Delhi / Najafgarh
Najafgarh, month by month
Najafgarh has a measured daily mean on 509 days since 19 February 2025. Its worst month was November 2025, at 261 US AQI (186.5 µg/m³), 15th of 2,715 cities on that month's world ranking. Its cleanest was August 2025, at 77 US AQI (22.9 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
3 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). |
| Jan 2026 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | 9 of 28 days measured; a month needs 20. The others: 1 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Najafgarh's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| November 2025 | 261186.5 µg/m³ | 15thof 2,715 | – |
| December 2025 | 229154.2 µg/m³ | 20thof 3,006 | North-western India, December 2025 |
| October 2025 | 17285.2 µg/m³ | 25thof 2,614 | India and Pakistan, October 2025 |
| February 2026 | 16677.2 µg/m³ | 28thof 2,866 | – |
| April 2025 | 16068.4 µg/m³ | 12thof 2,951 | – |
| March 2026 | 15865.4 µg/m³ | 36thof 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.
Najafgarh's worst days
| Day | US AQI | Episode |
|---|---|---|
| 14 Dec 2025 | 489320.0 µg/m³ | North-western India, December 2025 |
| 21 Oct 2025 | 406278.0 µg/m³ | India and Pakistan, October 2025 |
| 10 Nov 2025 | 388269.0 µg/m³ | – |
| 11 Nov 2025 | 368259.0 µg/m³ | – |
| 13 Nov 2025 | 364257.0 µg/m³ | – |
| 13 Dec 2025 | 338244.0 µg/m³ | North-western India, December 2025 |
| 6 Nov 2025 | 318234.0 µg/m³ | – |
| 2 Dec 2025 | 318234.0 µg/m³ | – |
| 12 Nov 2025 | 314232.0 µg/m³ | – |
| 14 Nov 2025 | 308229.0 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, Najafgarh, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/najafgarh/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.
Najafgarh now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).