SmogRank / Slovakia / Banská Bystrica Region / Hnúšťa
Hnúšťa, month by month
Hnúšťa has a measured daily mean on 1,016 days since 1 January 2023. Its worst month was February 2025, at 87 US AQI (28.3 µg/m³), 229th of 2,633 cities on that month's world ranking. Its cleanest was September 2026, at 36 US AQI (6.4 µg/m³). 2025 averaged 58 US AQI (12.9 µg/m³), against 55 US AQI (11.3 µg/m³) in 2023.
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
12 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). |
| Dec 2025 | No day measured. The others: 31 with readings for part of the day (a day needs 18 hours). |
| Oct 2025 | 17 of 31 days measured; a month needs 22. The others: 14 with readings for part of the day (a day needs 18 hours). |
| Oct 2024 | 12 of 31 days measured; a month needs 22. The others: 19 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 1 with no readings from the monitor, 29 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: 6 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours). |
| Apr 2024 | 20 of 30 days measured; a month needs 21. The others: 10 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | 12 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours). |
| Mar 2023 | 9 of 31 days measured; a month needs 22. The others: 2 with readings for part of the day (a day needs 18 hours), 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. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Hnúšťa's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 8728.3 µg/m³ | 229thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2025 | 8225.6 µg/m³ | 155thof 2,474 | Europe, 24 December 2024 to 3 January 2025 |
| January 2024 | 8024.7 µg/m³ | 180thof 2,385 | Europe, 8 to 27 January 2024 |
| December 2024 | 7924.1 µg/m³ | 150thof 2,616 | Europe, 24 December 2024 to 3 January 2025 |
| November 2024 | 7723.1 µg/m³ | 146thof 2,624 | Eastern Europe, 25 to 29 November 2024 Europe, November 2024 |
| December 2023 | 7622.6 µg/m³ | 117thof 2,247 | – |
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.
Hnúšťa's worst days
| Day | US AQI | Episode |
|---|---|---|
| 29 Dec 2024 | 15156.2 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 23 Jan 2024 | 14553.5 µg/m³ | Europe, 8 to 27 January 2024 |
| 24 Feb 2025 | 14352.5 µg/m³ | Europe, 14 February to 1 March 2025 |
| 24 Jan 2024 | 14151.9 µg/m³ | Europe, 8 to 27 January 2024 |
| 2 Feb 2024 | 13047.4 µg/m³ | – |
| 2 Feb 2025 | 12645.6 µg/m³ | Europe, 1 to 14 February 2025 |
| 26 Nov 2024 | 12244.2 µg/m³ | Eastern Europe, 25 to 29 November 2024 |
| 12 Nov 2024 | 12244.1 µg/m³ | Europe, November 2024 |
| 2 Jan 2023 | 11340.2 µg/m³ | – |
| 7 Jan 2025 | 11239.9 µg/m³ | – |
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, Hnúšťa, 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/hnusta/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.
Hnúšťa 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).