SmogRank / India / Chhattisgarh / Durena
Durena, month by month
Durena has a measured daily mean on 478 days since 19 February 2025. Its worst month was March 2026, at 164 US AQI (74.5 µg/m³), 22nd of 2,971 cities on that month's world ranking. Its cleanest was August 2026, at 51 US AQI (9.2 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
6 months
| Month | Why |
|---|---|
| Oct 2026 | 1 of 12 days measured; a month needs 9. The others: 11 with no readings from the monitor. |
| May 2026 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| 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 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Sep 2025 | 13 of 30 days measured; a month needs 21. The others: 17 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.
Durena's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| March 2026 | 16474.5 µg/m³ | 22ndof 2,971 | India, March 2026 |
| July 2025 | 15967.4 µg/m³ | 9thof 2,889 | Northern India, July 2025 India, July 2025 |
| March 2025 | 15256.3 µg/m³ | 56thof 2,862 | Northern India, March and April 2025 |
| April 2025 | 15155.7 µg/m³ | 24thof 2,951 | North-eastern India, April 2025 Northern India, March and April 2025 |
| May 2025 | 12946.7 µg/m³ | 42ndof 2,826 | – |
| December 2025 | 12244.2 µg/m³ | 236thof 3,006 | – |
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.
Durena's worst days
| Day | US AQI | Episode |
|---|---|---|
| 8 Mar 2026 | 242167.0 µg/m³ | India, March 2026 |
| 27 Feb 2026 | 234159.0 µg/m³ | – |
| 14 Mar 2026 | 206131.0 µg/m³ | – |
| 15 Jul 2025 | 196120.0 µg/m³ | – |
| 12 Mar 2026 | 196120.0 µg/m³ | – |
| 7 Jul 2025 | 190111.0 µg/m³ | – |
| 12 Jul 2025 | 190111.0 µg/m³ | India, July 2025 |
| 2 Jul 2025 | 188108.0 µg/m³ | – |
| 18 Mar 2026 | 187107.0 µg/m³ | – |
| 22 Jul 2025 | 186106.0 µg/m³ | Northern India, July 2025 |
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, Durena, India, 19 Feb 2025 – 1 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/durena/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.
Durena 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).