Air quality in Wels, Upper Austria, Austria today

Mr. Duck’s Air Quality Score

Moderate air today for Wels, Upper Austria, Austria

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The overall air quality in Wels is classified as Moderate. The main pollutant contributing to this assessment is PM2.5 (fine particles). Current measurements show a PM2.5 concentration of 18.79416 and a PM10 concentration of 21.8160362, based on five valid observations recorded via OpenAQ.

This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The air quality data for Wels covers seven key pollutants: carbon monoxide (CO), nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter with a diameter of 10 µm or less (PM₁₀), fine particles (PM₂.5), and sulfur dioxide (SO₂). These measurements come from a single monitoring station located on Linzerstraße, which is the only source of data for all listed pollutants in the city.

The most recent update across the dataset was recorded on 2026‑02‑10 20:00 UTC. CO, NO₂, O₃, PM₁₀, PM₂.5 and SO₂ were all refreshed within three days of that timestamp, indicating a high level of data freshness for these pollutants. In contrast, NO values are marked as “Old data” with the last update on 2024‑03‑11 12:00 UTC, showing that this particular measurement is significantly older than the others.

The numeric ranges reveal how variable each pollutant can be at the Linzerstraße site. CO spans from a low of 256.112 µg/m³ to a high of 352.949 µg/m³, with a median of 304.5305 µg/m³ and a 10th percentile of 265.7957 µg/m³. NO₂ shows a narrower spread: its minimum is 23.081501 µg/m³, maximum 24.8942986 µg/m³, and median 23.9878998 µg/m³, indicating relatively stable concentrations. O₃ ranges from 15.079 to 33.403 µg/m³, while PM₁₀ varies between 16.82199859 and 21.8160362 µg/m³. Fine particles (PM₂.5) have a broader spread, from 10.7414999 to 18.79416 µg/m³, with a median of 14.76782995 µg/m³. SO₂ concentrations are low and tightly clustered around 3.033349 to 3.29100012 µg/m³.

Because the dataset is derived from a single station, it provides a detailed snapshot for that location but does not capture spatial variations across Wels. The presence of an older NO measurement suggests that some pollutants may have less frequent updates, which could affect the overall representativeness of city‑wide air quality conditions.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

Data notes: The dataset contains five valid measurements and is updated within three days, with the most recent update recorded at 2026-02-10T20:00:00+00:00. This snapshot reflects current air quality conditions in Wels, Upper Austria, but please note that air quality can vary by location and time within the city.

OpenAQ station rows