Air quality in Lorient, Brittany, France today

Mr. Duck’s Air Quality Score

Good air today for Lorient, Brittany, 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 Lorient today is classified as Good. The primary pollutant identified is PM2.5, with a measured concentration of 2.5 µg/m³ and an accompanying PM10 value of 3.5 µg/m³ based on seven 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 Lorient air‑quality record contains data for five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀) and particulate matter 2.5 µm or less (PM₂.₅). These observations come from 16 individual rows of sensor readings collected at four monitoring stations across the city.

The most recent data are generally very fresh: NO₂, O₃, PM₁₀ and PM₂.₅ were all last updated on 2026‑02‑10 15:00 UTC, while the latest NO reading dates from 2024‑03‑11 09:00 UTC. Across the recent pollutants the recorded values span a modest range – for example NO₂ varies between 3.6 and 14.2 µg/m³ with a median of 8.55 µg/m³, O₃ ranges from 41.7 to 76.0 µg/m³ (median 52.3 µg/m³), PM₁₀ from 2.8 to 30.2 µg/m³ (median 3.5 µg/m³) and PM₂.₅ from 2.1 to 16.9 µg/m³ (median 2.5 µg/m³). The ten‑percentile values are close to the minima for each pollutant, indicating that low concentrations are common, while the ninety‑percentile values approach the maxima, showing occasional higher readings.

Coverage is uneven across pollutants: three of the four stations provide recent NO₂, O₃, PM₁₀ and PM₂.₅ data, but only one station supplies NO measurements, and those are older than two years. Consequently, while most recent snapshots give a clear picture for the majority of pollutants, the NO dataset is limited in both spatial and temporal resolution, meaning city‑wide conditions for that gas may be less well represented. Overall, Lorient’s air‑quality data set offers a fairly up‑to‑date view for most key pollutants, though some gaps remain.

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 Lorient are based on seven valid measurements and have been refreshed recently, with the latest update recorded at 2026‑02‑10 15:00 UTC; the dataset is considered “Updated within 3 days.” This snapshot reflects conditions measured at specific monitoring points and times, but air quality can differ across neighborhoods and throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows