Air quality in Leuven, Flemish Brabant, Belgium today

Mr. Duck’s Air Quality Score

Good air today for Leuven, Flemish Brabant, Belgium

⚠️ 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 Leuven today is classified as Good. The primary pollutant measured is PM2.5 (fine particles). According to the latest data, the concentration of PM2.5 stands at 0.40 µg/m³ based on five valid measurements.

Overall conditions meet the Good category criteria, and no additional pollutants are highlighted in the current 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 Leuven currently contains a single monitoring location, Groene Longen Oud‑Heverleestraat, which provides one row of measurements for each of the five tracked variables. All rows are recent: the latest update timestamp is 2026‑02‑10 19:00 UTC, placing every reading within the past three days. The pollutants and environmental parameters available are PM1, PM2.5, relative humidity, temperature and UM003 (particle count per cubic centimetre).

For this station the recorded values show virtually no variation across the single observation. PM1 is reported as 0.0 µg/m³, while PM2.5 registers a constant 0.4000000059604645 µg/m³. Relative humidity is uniformly high at 99.0999984741211 %, and temperature stays steady at 8.300000190734863 °C. The UM003 count is fixed at 202.0 particles/cm³. Because only one row exists, the minimum, median, maximum, 10th‑percentile and 90th‑percentile statistics are identical for each parameter.

With just one sensor contributing data, coverage across Leuven is limited; spatial differences in air quality cannot be captured from this source alone. The freshness of the dataset is good—every measurement was logged less than three days ago—but the lack of multiple stations means that conditions elsewhere in the city may differ from those recorded at Groene Longen Oud‑Heverleestraat. Users should keep in mind that these figures represent a snapshot from a single point rather than a comprehensive citywide picture.

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 reflects five valid measurements collected for Leuven and was updated within three days, with the latest update recorded at 2026‑02‑10 19:00 UTC. This snapshot provides a recent view of air quality across the city, but conditions can differ by specific neighbourhoods and change throughout the day, so local variations may not be captured in these figures.

OpenAQ station rows