SmogRank / Sweden / Västmanland / Köping
Köping, month by month
Köping has a measured daily mean on 360 days since 21 December 2024. Its worst month was February 2025, at 56 US AQI (11.9 µg/m³), 1,023rd of 2,633 cities on that month's world ranking. Its cleanest was January 2025, at 17 US AQI (3.0 µg/m³).
Every month since 2024
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
12 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 11 with readings for part of the day (a day needs 18 hours). |
| Sep 2026 | 5 of 30 days measured; a month needs 21. The others: 24 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks. |
| Aug 2026 | 1 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | 5 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Dec 2025 | 10 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 6 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Sep 2025 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2025 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | 6 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Dec 2024 | 11 of 31 days measured; a month needs 22. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Köping's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 5611.9 µg/m³ | 1,023rdof 2,633 | – |
| March 2026 | 5310.1 µg/m³ | 1,648thof 2,971 | Europe, 1 to 12 March 2026 |
| March 2025 | 529.5 µg/m³ | 1,686thof 2,862 | – |
| July 2025 | 386.9 µg/m³ | 2,023rdof 2,889 | – |
| February 2026 | 346.2 µg/m³ | 2,389thof 2,866 | – |
| April 2025 | 305.4 µg/m³ | 2,443rdof 2,951 | – |
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.
Köping's worst days
| Day | US AQI | Episode |
|---|---|---|
| 10 Mar 2026 | 8527.6 µg/m³ | Europe, 1 to 12 March 2026 |
| 11 Mar 2026 | 8024.6 µg/m³ | Europe, 1 to 12 March 2026 |
| 19 Mar 2026 | 7823.5 µg/m³ | – |
| 21 Feb 2025 | 7723.0 µg/m³ | – |
| 20 Jan 2026 | 7622.6 µg/m³ | – |
| 18 Feb 2026 | 7321.1 µg/m³ | – |
| 22 Feb 2025 | 7119.8 µg/m³ | – |
| 10 Feb 2025 | 6818.4 µg/m³ | – |
| 25 Mar 2025 | 6818.2 µg/m³ | – |
| 23 Feb 2025 | 6818.1 µg/m³ | – |
Daily means, the highest since 21 Dec 2024; 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, Köping, Sweden, 21 Dec 2024 – 26 Sep 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/se/koeping/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.
Köping now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).