Air quality in Dortmund, North Rhine-Westphalia, Germany today

Mr. Duck’s Air Quality Score

Good air today for Dortmund, North Rhine-Westphalia, 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 Dortmund today is classified as Good. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 7.51 and a PM10 reference value of 10.673, based on seven valid observations recorded through OpenAQ.

Overall conditions meet the criteria for a Good rating according to the provided assessment. 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 Dortmund pulls measurements from four monitoring sites and contains a total of seventeen recent rows. All eight pollutants tracked by the OpenAQ feed are represented: nitrogen monoxide (NO), nitrogen dioxide (NO2), ozone (O3), particulate matter in three size fractions (PM1, PM2.5, PM10), relative humidity and temperature. The newest observations across most parameters were recorded on 2026‑02‑10 at 17:00 UTC, giving a snapshot that is only a few days old for NO2, PM10, PM2.5, O3 and the broader set of particulate matter values. A single older entry for NO dates back to 2024‑03‑11 at 11:00 UTC, while the measurements from the “Puzi Home” location (PM1, relative humidity and temperature) were last updated on 2026‑01‑20 at 19:00 UTC, roughly one month ago.

Across the recent rows, PM10 values range from a low of 8.75 µg/m³ to a high of about 21.39 µg/m³, with a median near 10.56 µg/m³; NO2 spans 19.61‑23.49 µg/m³ (median 22.40 µg/m³); and PM2.5 varies between 7.48 µg/m³ and 27.88 µg/m³ (median 7.51 µg/m³). The single NO reading sits at the upper end of its historic range, 18.26 µg/m³, while O3 is reported as a constant 33.795 µg/m³ for the latest entry. The ancillary variables show little variation: relative humidity is recorded at 43.23 % and temperature at 11.06 °C for the most recent site.

Because the coverage differs by pollutant—four stations contribute to NO2, PM10 and PM2.5, but only one provides NO and another supplies PM1, humidity and temperature—the picture of air quality can change noticeably across neighbourhoods and over time. Users should keep in mind that some data points are older than a month or even two years, so conditions may differ from the values shown here depending on location and the exact moment of measurement.

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 reflect seven valid measurements and were refreshed recently, with the latest update recorded on 2026‑02‑10 at 17:00 UTC; they are considered “Updated within 3 days.” This snapshot provides a brief view of current conditions, but air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in Dortmund.

OpenAQ station rows