SmogRank / India / Chhattisgarh / Siltara
Siltara, month by month
Siltara has a measured daily mean on 482 days since 19 February 2025. Its worst month was March 2025, at 173 US AQI (87.3 µg/m³), 9th of 2,862 cities on that month's world ranking. Its cleanest was September 2025, at 57 US AQI (12.4 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
7 months
| Month | Why |
|---|---|
| Oct 2026 | 6 of 12 days measured; a month needs 9. The others: 6 with no readings from the monitor. |
| Jul 2026 | 20 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours). |
| Jan 2026 | 20 of 31 days measured; a month needs 22. The others: 9 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours). |
| Oct 2025 | 20 of 31 days measured; a month needs 22. The others: 11 with readings for part of the day (a day needs 18 hours). |
| Jun 2025 | 19 of 30 days measured; a month needs 21. The others: 11 with readings for part of the day (a day needs 18 hours). |
| Apr 2025 | 20 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours). |
| 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.
Siltara's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| March 2025 | 17387.3 µg/m³ | 9thof 2,862 | Northern India, March and April 2025 India, March 2025 |
| December 2025 | 14653.7 µg/m³ | 183rdof 3,006 | – |
| February 2026 | 14352.5 µg/m³ | 95thof 2,866 | – |
| May 2026 | 11942.8 µg/m³ | 87thof 2,874 | Northern India, May 2026 |
| April 2026 | 11641.7 µg/m³ | 116thof 2,941 | – |
| November 2025 | 11440.6 µg/m³ | 209thof 2,715 | North-western India, November 2025 |
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.
Siltara's worst days
| Day | US AQI | Episode |
|---|---|---|
| 13 Dec 2025 | 500+369.0 µg/m³ | – |
| 12 Mar 2025 | 290215.0 µg/m³ | India, March 2025 |
| 27 Mar 2025 | 249174.0 µg/m³ | Northern India, March and April 2025 |
| 28 Mar 2025 | 248173.0 µg/m³ | Northern India, March and April 2025 |
| 1 Mar 2025 | 237162.0 µg/m³ | – |
| 13 Apr 2026 | 220145.0 µg/m³ | – |
| 2 Mar 2025 | 201126.0 µg/m³ | – |
| 13 Mar 2025 | 198122.0 µg/m³ | India, March 2025 |
| 29 Mar 2025 | 196120.0 µg/m³ | Northern India, March and April 2025 |
| 12 Dec 2025 | 191113.0 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, Siltara, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/siltara/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.
Siltara 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).