SmogRank / Slovakia / Košice Region / Košice
Košice, month by month
Košice has a measured daily mean on 1,117 days since 1 January 2023. Its worst month was February 2025, at 86 US AQI (27.8 µg/m³), 239th of 2,633 cities on that month's world ranking. Its cleanest was September 2026, at 43 US AQI (7.7 µg/m³). 2025 averaged 62 US AQI (14.8 µg/m³), against 66 US AQI (16.9 µg/m³) in 2024.
Every month since 2023
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
10 months
| Month | Why |
|---|---|
| Mar 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. |
| Feb 2026 | No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2025 | 20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 14 of 31 days measured; a month needs 22. The others: 17 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.
Košice's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 8627.8 µg/m³ | 239thof 2,633 | Europe, 14 February to 1 March 2025 |
| November 2024 | 8326.4 µg/m³ | 86thof 2,624 | Eastern Europe, 25 to 29 November 2024 Southern Europe, November 2024and 2 more |
| February 2023 | 8024.5 µg/m³ | 57thof 1,129 | Europe, 28 February to 4 March 2023 Europe, 6 to 25 February 2023 |
| January 2025 | 7823.8 µg/m³ | 196thof 2,474 | Germany, France and 19 more countries, January 2025 |
| January 2024 | 7823.4 µg/m³ | 205thof 2,385 | Europe, 27 January to 2 February 2024 Europe, 28 to 31 January 2024and 1 more |
| February 2024 | 7522.1 µg/m³ | 177thof 2,486 | Europe, 27 January to 2 February 2024 |
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.
Košice's worst days
| Day | US AQI | Episode |
|---|---|---|
| 11 Feb 2023 | 16068.8 µg/m³ | Europe, 6 to 25 February 2023 |
| 2 Feb 2024 | 15561.6 µg/m³ | Europe, 27 January to 2 February 2024 |
| 17 Feb 2023 | 15257.2 µg/m³ | Europe, 6 to 25 February 2023 |
| 10 Feb 2023 | 15256.4 µg/m³ | Europe, 6 to 25 February 2023 |
| 16 Feb 2023 | 14653.9 µg/m³ | Europe, 6 to 25 February 2023 |
| 11 Nov 2024 | 14553.5 µg/m³ | Europe, November 2024 |
| 4 Mar 2023 | 13950.8 µg/m³ | Europe, 28 February to 4 March 2023 |
| 23 Jan 2024 | 13850.5 µg/m³ | Europe, 8 to 27 January 2024 |
| 18 Dec 2025 | 13649.6 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 23 Feb 2025 | 13549.2 µg/m³ | Europe, 14 February to 1 March 2025 |
Daily means, the highest since 1 Jan 2023; 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, Košice, Slovakia, 1 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/sk/kosice/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.
Košice now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 17:07 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).