SmogRank / World / Europe / Austria / Lower Austria

Most polluted cities in Lower Austria, Austria

12 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Sankt Valentin at 8.9 µg/m³, #808 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: 12 measured citiesUpper Austria: 7 measured citiesBurgenland: 2 measured citiesStyria: 5 measured citiesVienna: 1 measured city#12 Baden: 5.5 µg/m³#11 Groß-Enzersdorf: 6.7 µg/m³#10 Hainburg an der Donau: 6.9 µg/m³#9 Mödling: 7.0 µg/m³#8 Wiener Neustadt: 7.2 µg/m³#6 Perchtoldsdorf: 7.3 µg/m³#7 Gänserndorf: 7.3 µg/m³#5 Sankt Pölten: 7.4 µg/m³#4 Klosterneuburg: 7.5 µg/m³#3 Tulln: 7.6 µg/m³#2 Amstetten: 8.4 µg/m³#1 Sankt Valentin: 8.9 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Sankt Valentin 0% 0.75%0
Every measured city in Lower 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. 1Sankt Valentin 0%
  2. 2Amstetten 0%
  3. 3Tulln 0%
  4. 4Klosterneuburg 0%
  5. 5Sankt Pölten 0%
  6. 6Perchtoldsdorf 0%
  7. 6Gänserndorf 0%
  8. 8Wiener Neustadt 0%
  9. 9Mödling 0%
  10. 10Hainburg an der Donau 0%
  11. 11Groß-Enzersdorf 0%
  12. 12Badenlow-cost sensors 0%

Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.

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

Lower 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
Stockerau≈ 13 µg/m³Moderate

Bad-air episodes in Lower Austria

Times when many cities around here had PM2.5 at twice their usual or more on the same days.

Use this board

SmogRank, most polluted cities in Lower Austria, Austria, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/at/region/lower-austria?w=30d.

Download top 10 (PNG)

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.