Air quality in Kassel, Hesse, Germany today

Mr. Duck’s Air Quality Score

Moderate air today for Kassel, Hesse, 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 Kassel today is classified as Moderate. The primary pollutant identified is PM2.5, with a measured concentration of 10.42 µg/m³. In addition, the level of PM10 recorded is 13.34 µg/m³ based on eight valid observations.

These figures are presented through OpenAQ data for Kassel, Hesse, Germany. 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 OpenAQ feed for Kassel in Hesse supplies data on seven pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀), particulate matter 2.5 µm or less (PM₂.₅) and sulfur dioxide (SO₂). The dataset comprises eleven measurement rows drawn from two monitoring stations, giving a modest spatial coverage across the city.

Freshness varies by compound. CO, O₃, PM₁₀, PM₂.₅ and SO₂ all have their most recent values recorded on 2026‑02‑10, each updated within the last three days. NO₂ was also refreshed on 2026‑02‑10, while the latest NO reading dates back to 2024‑03‑11, making it the oldest entry in the set. Across the pollutants, the newest timestamps cluster around early February 2026, indicating that most of the current picture reflects very recent conditions.

The recorded concentrations show a fairly narrow spread for several substances. For example, PM₂.₅ ranges from 10.42 to 11.95 µg/m³ with a median of about 11.19 µg/m³, and O₃ is reported at a single value of 35.71 µg/m³. In contrast, NO exhibits a broader range—from roughly 2.44 to 22.38 µg/m³—highlighting greater variability or possibly fewer observations for that pollutant. The median values for NO₂ (30.10 µg/m³) and PM₁₀ (20.23 µg/m³) sit between their respective minima and maxima, suggesting typical levels are centrally located within the observed spread.

Because only two stations contribute data, conditions can differ across neighbourhoods and times not captured by these rows. Users should keep in mind that the snapshot reflects limited spatial sampling and that some pollutants, notably NO, rely on older measurements, so the picture may not fully represent current city‑wide air quality.

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 Kassel are based on eight valid measurements and were refreshed recently, with the latest update recorded at 2026‑02‑10T18:00:00+00:00 (updated within 3 days). These values represent a snapshot of conditions across the monitoring network; air quality can differ by specific location and time of day within the city, so individual experiences may vary.

OpenAQ station rows