SmogRank / World / Slovakia / Bratislava Region / December 2025
Most polluted cities in Bratislava Region, Slovakia, December 2025
2 cities in Bratislava Region, Slovakia ranked by their average PM2.5 over the 31 days. Worst: Malacky at 15.4 µg/m³, #711 of 2,960 cities in the world. Cleanest: Bratislava at 12.6. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Malacky 0%
- 2Bratislava 0%
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
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SmogRank, most polluted cities in Bratislava Region, Slovakia, PM2.5, December 2025, smogrank.com/sk/region/bratislava-region/history/2025-12 (accessed 6 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.