SmogRank / India / Odisha / Koīra
Koīra, month by month
Koīra has a measured daily mean on 430 days since 19 February 2025. Its worst month was December 2025, at 141 US AQI (51.6 µg/m³), 191st of 3,006 cities on that month's world ranking. Its cleanest was August 2026, at 38 US AQI (6.9 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
6 months
| Month | Why |
|---|---|
| Oct 2026 | 4 of 12 days measured; a month needs 9. The others: 7 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Feb 2026 | 14 of 28 days measured; a month needs 20. The others: 4 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours). |
| Jan 2026 | 5 of 31 days measured; a month needs 22. The others: 18 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours). |
| Oct 2025 | 12 of 31 days measured; a month needs 22. The others: 16 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Sep 2025 | 19 of 30 days measured; a month needs 21. The others: 3 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours). |
| Feb 2025 | 9 of 28 days measured; a month needs 20. The others: 1 with readings for part of the day (a day needs 18 hours). |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Koīra's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2025 | 14151.6 µg/m³ | 191stof 3,006 | – |
| March 2025 | 13348.4 µg/m³ | 94thof 2,862 | Northern India, March and April 2025 India, March 2025 |
| April 2025 | 11741.8 µg/m³ | 74thof 2,951 | Northern India, March and April 2025 |
| November 2025 | 11139.7 µg/m³ | 215thof 2,715 | – |
| March 2026 | 9432.0 µg/m³ | 222ndof 2,971 | – |
| April 2026 | 8326.5 µg/m³ | 276thof 2,941 | – |
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.
Koīra's worst days
| Day | US AQI | Episode |
|---|---|---|
| 30 Mar 2025 | 17995.4 µg/m³ | Northern India, March and April 2025 |
| 13 Apr 2025 | 17893.5 µg/m³ | – |
| 18 Dec 2025 | 17083.2 µg/m³ | – |
| 31 Mar 2025 | 16879.9 µg/m³ | Northern India, March and April 2025 |
| 5 Dec 2025 | 16779.0 µg/m³ | – |
| 14 Mar 2025 | 16778.8 µg/m³ | India, March 2025 |
| 25 Nov 2025 | 16677.0 µg/m³ | – |
| 4 Jan 2026 | 16575.4 µg/m³ | – |
| 2 Jan 2026 | 16575.3 µg/m³ | – |
| 21 Dec 2025 | 16474.3 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, Koīra, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/koira/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.
Koīra now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).