SmogRank / Slovakia / Košice Region / Čaňa
Čaňa, month by month
Čaňa has a measured daily mean on 1,043 days since 1 January 2023. Its worst month was February 2025, at 113 US AQI (40.4 µg/m³), 93rd of 2,633 cities on that month's world ranking. Its cleanest was July 2026, at 38 US AQI (6.8 µg/m³). 2025 averaged 70 US AQI (19.1 µg/m³), against 73 US AQI (21.1 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
13 months
| Month | Why |
|---|---|
| Mar 2026 | 19 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours). |
| Feb 2026 | No day measured. The others: 28 with no readings from the monitor. |
| Jan 2026 | No day measured. The others: 30 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Nov 2025 | 20 of 30 days measured; a month needs 21. The others: 10 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). |
| Oct 2024 | 14 of 31 days measured; a month needs 22. The others: 17 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 30 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 15 of 31 days measured; a month needs 22. The others: 4 with no readings from the monitor, 12 with readings for part of the day (a day needs 18 hours). |
| Apr 2024 | 19 of 30 days measured; a month needs 21. The others: 11 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | 14 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 7 with readings for part of the day (a day needs 18 hours). |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
| Jan 2023 | 21 of 31 days measured; a month needs 22. The others: 4 with readings for part of the day (a day needs 18 hours), 6 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Čaňa's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 11340.4 µg/m³ | 93rdof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| November 2024 | 9432.3 µg/m³ | 60thof 2,624 | Eastern Europe, 25 to 29 November 2024 Southern Europe, November 2024and 2 more |
| March 2025 | 8427.0 µg/m³ | 375thof 2,862 | Europe, March 2025 Germany, Poland and 25 more countries, March 2025and 1 more |
| January 2024 | 8326.3 µg/m³ | 158thof 2,385 | Europe, 8 to 27 January 2024 South-eastern Europe, 28 December 2023 to 1 January 2024 |
| December 2023 | 8225.9 µg/m³ | 89thof 2,247 | South-eastern Europe, 28 December 2023 to 1 January 2024 Eastern Europe, December 2023 |
| January 2025 | 8125.3 µg/m³ | 159thof 2,474 | – |
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.
Čaňa's worst days
| Day | US AQI | Episode |
|---|---|---|
| 27 Dec 2023 | 16676.6 µg/m³ | – |
| 7 Nov 2024 | 16270.8 µg/m³ | Europe, November 2024 |
| 9 Feb 2025 | 16169.4 µg/m³ | Europe, 1 to 14 February 2025 |
| 21 Feb 2025 | 15864.9 µg/m³ | Europe, 14 February to 1 March 2025 |
| 9 Mar 2025 | 15763.9 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 5 Mar 2025 | 15460.2 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 6 Mar 2025 | 15460.2 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 10 Jan 2024 | 15459.2 µg/m³ | Europe, 8 to 27 January 2024 |
| 27 Nov 2024 | 15256.4 µg/m³ | Eastern Europe, 25 to 29 November 2024 |
| 20 Feb 2025 | 15155.5 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, Čaňa, Slovakia, 1 Jan 2023 – 12 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/sk/cana/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.
Čaňa now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).