SmogRank / India / Odisha / Byasanagar
Byasanagar, month by month
Byasanagar has a measured daily mean on 489 days since 19 February 2025. Its worst month was December 2025, at 189 US AQI (110.4 µg/m³), 43rd of 3,006 cities on that month's world ranking. Its cleanest was August 2025, at 66 US AQI (17.2 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 | 3 of 12 days measured; a month needs 9. The others: 6 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Jun 2026 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Mar 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. |
| 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.
Byasanagar's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2025 | 189110.4 µg/m³ | 43rdof 3,006 | – |
| November 2025 | 16372.1 µg/m³ | 89thof 2,715 | – |
| February 2026 | 16068.2 µg/m³ | 41stof 2,866 | – |
| March 2025 | 13850.4 µg/m³ | 84thof 2,862 | – |
| October 2025 | 10035.4 µg/m³ | 168thof 2,614 | India and Pakistan, October 2025 |
| September 2026 | 9532.5 µg/m³ | 104thof 2,997 | Eastern India, 15 to 17 September 2026 North-eastern India and Bhutan, September 2026 |
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.
Byasanagar's worst days
| Day | US AQI |
|---|---|
| 31 Dec 2025 | 263188.0 µg/m³ |
| 30 Dec 2025 | 230155.0 µg/m³ |
| 18 Dec 2025 | 217142.0 µg/m³ |
| 25 Nov 2025 | 214139.0 µg/m³ |
| 26 Dec 2025 | 206131.0 µg/m³ |
| 20 Dec 2025 | 200125.0 µg/m³ |
| 17 Dec 2025 | 198123.0 µg/m³ |
| 24 Nov 2025 | 198122.0 µg/m³ |
| 29 Dec 2025 | 197121.0 µg/m³ |
| 2 Jan 2026 | 196120.0 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, Byasanagar, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/byasanagar/history (accessed 13 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.
Byasanagar now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).