SmogRank / Slovakia / Žilina Region / Martin
Martin, month by month
Martin has a measured daily mean on 1,078 days since 1 January 2023. Its worst month was February 2025, at 95 US AQI (32.5 µg/m³), 185th of 2,633 cities on that month's world ranking. Its cleanest was September 2026, at 39 US AQI (7.0 µg/m³). 2025 averaged 62 US AQI (14.8 µg/m³), against 63 US AQI (15.4 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 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 12 of 31 days measured; a month needs 22. The others: 19 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.
Martin's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 9532.5 µg/m³ | 185thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| February 2023 | 8225.6 µg/m³ | 46thof 1,129 | Europe, 6 to 25 February 2023 |
| January 2025 | 7622.7 µg/m³ | 220thof 2,474 | Germany, France and 19 more countries, January 2025 Europe, 24 December 2024 to 3 January 2025 |
| December 2023 | 7521.9 µg/m³ | 127thof 2,247 | Czechia, Slovakia and 2 more countries, December 2023 Europe, December 2023and 1 more |
| November 2024 | 7521.8 µg/m³ | 169thof 2,624 | Europe, November 2024 Eastern Europe, October and November 2024 |
| March 2025 | 7421.6 µg/m³ | 501stof 2,862 | Europe, March 2025 Germany, Poland and 25 more countries, March 2025and 1 more |
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.
Martin's worst days
| Day | US AQI | Episode |
|---|---|---|
| 10 Feb 2023 | 17590.3 µg/m³ | Europe, 6 to 25 February 2023 |
| 9 Feb 2023 | 17083.0 µg/m³ | Europe, 6 to 25 February 2023 |
| 11 Feb 2023 | 16879.4 µg/m³ | Europe, 6 to 25 February 2023 |
| 1 Jan 2025 | 16473.9 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 22 Jan 2025 | 15865.5 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 8 Feb 2023 | 15460.3 µg/m³ | Europe, 6 to 25 February 2023 |
| 1 Apr 2024 | 15459.8 µg/m³ | Europe, March and April 2024 |
| 29 Dec 2024 | 15357.7 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 10 Jan 2024 | 15256.6 µg/m³ | Europe, 8 to 27 January 2024 |
| 6 Dec 2023 | 15155.6 µg/m³ | Europe, December 2023 |
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, Martin, 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/martin/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.
Martin now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 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).