Air quality in Caen, Normandy, France today

Mr. Duck’s Air Quality Score

Good air today for Caen, 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 Caen today is classified as Good. The primary pollutant identified is PM2.5 (fine particles).

Measurements recorded for the city show a PM2.5 reference value of 1.5 and a PM10 reference value of 4.2, based on four valid observations collected via OpenAQ. This indicates that the concentrations of these particulate matter fractions are within the range associated with the Good category.

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 Caen air‑quality dataset contains measurements for six pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀) and particulate matter 2.5 µm or less (PM₂.₅). Data come from ten sensor rows in total, eight of which are classified as real‑time and two as static. For most pollutants the newest observations were recorded on 2026‑02‑10 at 15:00 UTC, meaning they are fresh within the last three days. CO is an exception, with its only value dated 2017‑12‑31 18:00 UTC, and NO is also older, last updated on 2024‑03‑11 09:00 UTC.

The recent measurements show a modest spread. NO₂ values range from 6.2 to 22.5 µg/m³ with a median of 14.35 µg/m³; PM₁₀ varies between 4.2 and 22.2 µg/m³, median 13.2 µg/m³. Ozone is reported at a single recent value of 59.3 µg/m³, while PM₂.5 is recorded once at 1.5 µg/m³. The older CO reading stands at 30.5 µg/m³ and the lone NO measurement at 5.2 µg/m³.

Because most rows are recent but a few key pollutants rely on dated data, the picture of Caen’s air quality is uneven: fresh information is available for NO₂, PM₁₀, O₃ and PM₂.5, whereas CO and NO reflect conditions from several years ago. Consequently, while the dataset captures current variability for half of the measured species, it provides only historical snapshots for the others, meaning city‑wide conditions can differ across locations and times depending on which sensor data are available.

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 Caen are based on four valid measurements and have been updated within three days, with the latest refresh recorded at 2026‑02‑10 15:00 UTC. This snapshot reflects conditions at the time of collection; air quality can vary across different neighborhoods and change throughout the day, so values may differ from what you experience in other parts of the city.

OpenAQ station rows