Air quality in Heilbronn, Baden-Württemberg, Germany today

Mr. Duck’s Air Quality Score

Good air today for Heilbronn, Baden-Württemberg, Germany

⚠️ 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 Heilbronn today is classified as Good. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 3.0 µg/m³ and a PM10 reference value of 10.4 µg/m³, based on five valid observations recorded via OpenAQ.

These values reflect the current monitoring results for the city. 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 dataset for Heilbronn pulls measurements from three monitoring sites across thirteen recorded rows. It covers a full suite of common air‑quality variables: carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO2), ozone (O3), particulate matter sized ≤ 1 µm (PM1), ≤ 2.5 µm (PM2.5) and ≤ 10 µm (PM10), as well as relative humidity and temperature.

The most recent values are generally very fresh: CO, NO2, O3, PM2.5, PM10 and the associated timestamps were all logged on 2026‑02‑10 at 17:00 UTC, which is within the last three days. The only older entries are for NO (last updated 2024‑03‑11 11:00 UTC) and the PM1 and humidity readings from Offenau (both recorded on 2025‑05‑04 02:00 UTC). This mix means that while most pollutants reflect current conditions, a few still rely on data that is several months old.

Across the available measurements the observed ranges are modest. NO varies between 2.5 and 29.7 µg/m³ with a median of about 16 µg/m³, whereas NO2 spans 15.3 to 37.7 µg/m³ (median ≈ 26.5 µg/m³). PM2.5 shows the widest spread, from a low of 3.0 up to 42.2 µg/m³ and a median near 22.6 µg/m³, while PM10 is consistently low at 10.4 µg/m³ in its single recent record. CO is reported as a constant 500 µg/m³ for the latest entry, and O3 sits at 57.011 µg/m³. The humidity reading from Offenau is 73.41 % and temperature data are not listed among the freshest rows.

Because the dataset combines very recent observations with some older points, the picture it provides is uneven: most pollutants give a near‑real‑time snapshot of air quality in Heilbronn, but for NO, PM1 and humidity the values may no longer represent current conditions. Consequently, city‑wide averages can differ from what any single station records at a given moment.

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

The data shown for Heilbronn are based on five valid measurements and have been refreshed recently, with the latest update recorded at 2026‑02‑10T17:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at the time of measurement; air quality can vary across different neighbourhoods and times of day within the city.

OpenAQ station rows