SmogRank / World / Europe / Slovakia / Trnava Region
Most polluted cities in Trnava Region, Slovakia
3 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Sereď at 9.7 µg/m³, #676 in the world.
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.
Cities coloured by their PM2.5 over the last 24 hours. Fires, smoke and ash: Oct 5, the newest UTC day mapped.
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
Estimated: cities without a monitor
Trnava Region cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Piešťany | ≈ 14 µg/m³ |
| Dunajská Streda | ≈ 14 µg/m³ |
| Hlohovec | ≈ 13 µg/m³ |
| Skalica | ≈ 13 µg/m³ |
| Galanta | ≈ 14 µg/m³ |
Bad-air episodes in Trnava Region
- Slovakia, Czechia and Poland, June 202627 to 28 June 2026, 2 days18 cities33 µg/m³peak, Krompachy
- Eastern Europe, 15 to 17 April 20263 days25 cities44 µg/m³peak, Szeged
- Europe, 18 to 25 March 20268 days430 cities136 µg/m³peak, Łask
- Poland, Slovenia and Slovakia, March 202625 March 2026, 1 day9 cities58 µg/m³peak, Łask
- Eastern Europe, 16 to 21 December 20256 days129 cities298 µg/m³peak, Banja Luka
- Southern Europe, November 202512 to 17 November 2025, 6 days41 cities122 µg/m³peak, Bijelo Polje
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
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SmogRank, most polluted cities in Trnava Region, Slovakia, PM2.5, last 30 days to 7 Oct 2026, 00:00 UTC, smogrank.com/sk/region/trnava-region?w=30d.
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.
Updated 2026-10-07 00:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.