Air quality in Hallein, Salzburg, Austria today

Mr. Duck’s Air Quality Score

Moderate air today for Hallein, Salzburg, 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 air quality in Hallein, Salzburg, Austria is currently classified as Moderate. The primary pollutant identified is PM2.5, with a reference concentration of 18.0 µg/m³. This assessment is based on nine valid measurements collected for the day. Data is shown via OpenAQ. The latest reading was recorded at 2026-02-12 08:00 UTC, representing the current monitoring period.

The corresponding PM10 reference concentration is 37.56 µg/m³, also derived from the same set of nine measurements. Both particulate metrics contribute to the Moderate category assigned for today. The nine measurements include multiple monitoring stations within the city area, providing a representative sample for today. 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 Hallein air‑quality feed contains measurements for carbon monoxide (CO), nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM₁₀), particulate matter ≤ 2.5 µm (PM₂.₅) and sulphur dioxide (SO₂). Across the city the dataset comprises 32 recent measurement rows collected at six monitoring sites. For most pollutants the most recent entry is dated 2026‑02‑10 20:00 UTC, showing that the data are refreshed within the last three days. CO is an exception, with its latest value recorded on 2024‑12‑21 01:00 UTC, and NO is older still, last updated on 2024‑03‑11 12:00 UTC, indicating that coverage for these two gases is less current.

The numeric spread varies noticeably between substances. NO₂ values range from a low of –1 µg/m³ (a placeholder for missing data) up to 89 µg/m³, with a median of about 25.7 µg/m³ and the 10th‑percentile at 9.36 µg/m³ while the 90th‑percentile reaches 60.25 µg/m³. PM₁₀ shows a narrower band, from –1 to 37.56 µg/m³, median 19.2 µg/m³, 10th‑percentile 8.56 and 90th‑percentile 31.67. PM₂.₅ spans –1 to 18 µg/m³, median roughly 9.0 µg/m³, with the upper 90 % at 15.98 µg/m³. SO₂ is low‑level overall, ranging –1 to 5 µg/m³, median 2.66 µg/m³, and O₃ varies between –1 and 40 µg/m³, median 33 µg/m³, with a 90 % value of 38.6 µg/m³. CO exhibits the widest and most irregular spread, from –1000 to 826 µg/m³, median 261.9 µg/m³, reflecting many placeholder or out‑of‑range entries.

These figures illustrate that while Hallein’s dataset provides recent, multi‑site coverage for most pollutants, the temporal freshness and data completeness are uneven, especially for CO and NO, where older timestamps and extreme placeholder values limit the immediacy of the information. Consequently, city‑wide conditions can differ by location and time, and the current snapshot should be interpreted with that variability in mind.

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

This data set contains nine valid measurements and has been updated within 3 days. The latest update was recorded on 2026-02-10 at 20:00 UTC. Air quality can vary by location and time within the city, so this snapshot may not represent conditions everywhere in Hallein.

OpenAQ station rows