Air quality in Rouen, Normandy, France today

Mr. Duck’s Air Quality Score

Good air today for Rouen, Normandy, France

⚠️ 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 Rouen today is classified as Good. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 value of 3.2 µg/m³ and a PM10 value of 5.6 µg/m³, based on eight valid observations.

Data is 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 dataset for Rouen includes measurements of carbon monoxide (CO), nitrogen oxides (NO and NO₂), ozone (O₃), particulate matter up to 10 µm (PM10) and up to 2.5 µm (PM2.5), and sulphur dioxide (SO₂). In total there are 21 rows of observations coming from four monitoring stations spread across the city, so the spatial coverage is limited but does capture several distinct neighbourhoods.

Most pollutants have very recent data: CO, NO₂, PM10, PM2.5, O₃ and SO₂ were all last updated on 2026‑02‑10 at 15:00 UTC, meaning the values reflect conditions from just a few days ago. The only older entry is for NO, whose most recent record dates to 2024‑03‑11 at 09:00 UTC, so information on that gas is less current than the rest of the suite.

Across the fresh measurements the observed ranges are fairly wide. CO varies from 0 µg/m³ up to a maximum of 228 µg/m³, with a median of 114 µg/m³ and most values (90th percentile) clustered around 205 µg/m³. NO₂ spans 14.2–58.5 µg/m³, median 28.45 µg/m³; PM10 runs from 5.6 to 52 µg/m³, median 14.75 µg/m³; and PM2.5 ranges between 3.2 and 35.75 µg/m³, median 11.2 µg/m³. O₃ shows a minimum of 0.7 µg/m³ and peaks at 56.8 µg/m³ (median 28.75 µg/m³), while SO₂ stays low, from 0.5 to 2.0 µg/m³ with a median of 1.25 µg/m³. The NO data, being older, covers 25.0–84.4 µg/m³ (median 33.8 µg/m³).

Overall the dataset provides a recent snapshot for most pollutants but has uneven temporal coverage, especially for nitrogen monoxide. Because only four stations contribute, conditions can differ between locations and times not captured by these rows, so the figures represent a limited view of air quality across Rouen.

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 current dataset for Rouen includes eight valid measurements and is updated within three days, with the latest refresh recorded at 2026‑02‑10 15:00 UTC. These values represent a snapshot of ambient conditions across the city; air quality can differ by specific location and time of day, so individual experiences may vary from the reported figures.

OpenAQ station rows