Air quality in Uccle - Ukkel, Belgium today

Mr. Duck’s Air Quality Score

Good air today for Uccle - Ukkel, 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 Uccle - Ukkel is currently classified as Good. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 1.5038 and a PM10 reference value of 4.2406, based on five valid observations.

Data are shown via OpenAQ. 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 Uccle air‑quality record draws on eleven data rows collected from two monitoring sites and covers nine measured variables: nitrogen dioxide, ozone, particulate matter 1, particulate matter 2.5, particulate matter 10, sulfur dioxide, relative humidity, temperature and an additional parameter labelled UM003. For the five key pollutants (NO₂, O₃, PM₁, PM₂.5, PM₁₀) the most recent observations are from 2026‑02‑10 18:00 UTC, so these values are fresh within the last three days. In contrast, the readings for PM₁, relative humidity and temperature come from a single older entry dated 2025‑04‑30 06:00 UTC, indicating that those three variables have not been updated for many months.

The recent data show a narrow spread for several gases: NO₂ is consistently reported at 10.5 µg/m³, O₃ at 60.0 µg/m³ and SO₂ at 2.8 µg/m³ across the latest row, with median values identical to the minima and maxima. Particulate matter displays a broader range: PM₁₀ varies from 4.24 to 56.86 µg/m³ (median ≈30.55 µg/m³), while PM₂.5 spans 1.50 to 28.25 µg/m³ (median ≈14.88 µg/m³). The tenth‑percentile values for the two size fractions are around 9.5 µg/m³ for PM₁₀ and 4.18 µg/m³ for PM₂.5, whereas the ninetieth percentiles reach roughly 51.6 µg/m³ and 25.6 µg/m³ respectively, highlighting considerable variability in particle concentrations.

Overall, the dataset provides a solid snapshot of recent gas levels but is unevenly balanced: fresh measurements exist for most pollutants, yet the particulate‑size‑1 data and meteorological variables are dated. Because only two stations contribute, conditions can differ across neighbourhoods and times that are not captured by this limited set of rows.

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 Uccle‑Ukkel is based on five valid measurements and was updated within three days, with the latest record logged at 2026‑02‑10 18:00 UTC. While this snapshot reflects recent conditions, air quality can differ across neighbourhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows