SmogRank / World / Europe / Austria / Upper Austria

Most polluted cities in Upper Austria, Austria

7 measured cities, this year; 7 above the WHO annual guideline. Worst: Enns at 10.8 µg/m³, #845 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.

Lower Austria: 10 measured citiesUpper Austria: 7 measured citiesTyrol: 5 measured citiesSalzburg: 3 measured citiesStyria: 10 measured cities#7 Freistadt: 6.5 µg/m³#6 Steyr: 8.5 µg/m³#5 Wels: 9.7 µg/m³#4 Attnang-Puchheim: 10.0 µg/m³#3 Traun: 10.1 µg/m³#2 Linz: 10.5 µg/m³#1 Enns: 10.8 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Attnang-Puchheim 0% 0.75%0
Every measured city in Upper Austria, Austria, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Attnang-Puchheimlast full day 3 Oct 0%
  2. 2Linz 0%
  3. 3Wels 0%
  4. 4Enns 0%
  5. 5Traun 0%
  6. 6Steyr 0%
  7. 7Freistadt 0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

Upper Austria 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.

City7-day estimateBand
Ansfelden≈ 14 µg/m³Moderate

Bad-air episodes in Upper Austria

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 Upper Austria, Austria, PM2.5, this year to 6 Oct 2026, 22:00 UTC, smogrank.com/at/region/upper-austria?w=year.

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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 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.