Air quality in Saint-Malo, Brittany, France today
Mr. Duck’s Air Quality Score
Moderate air today for Saint-Malo, Brittany, France
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Saint‑Malo today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements recorded for the day show a PM2.5 value of 10.2 µg/m³ and a PM10 value of 6.6 µg/m³, based on four 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 Saint‑Malo air quality dataset currently contains five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM10) and particulate matter ≤2.5 µm (PM2.5). These values come from three monitoring stations, giving a total of nine data rows across the pollutants.
The most recent observations are from 2026‑02‑10 15:00 UTC for NO₂ and O₃, both updated within the last three days. PM10, PM2.5 and NO have their latest timestamps on 2026‑02‑09 03:00 UTC (within seven days) and 2024‑03‑11 09:00 UTC respectively, so the nitrogen monoxide reading is considerably older than the others. Across all pollutants the data are fairly fresh, with only one pollutant (NO) showing a timestamp from more than two years ago.
For NO₂ the recorded values range from a low of 3.8 µg/m³ to a high of 11.0 µg/m³, with a median of 4.83 µg/m³ and the central 80 % of measurements falling between about 4.0 and 9.8 µg/m³. Ozone shows a broader spread, from 37.1 to 89.5 µg/m³, median 50.78 µg/m³ and an 80 % interval roughly 40 to 82 µg/m³. The particulate measurements are single‑value entries: PM10 is consistently reported at 6.6 µg/m³ and PM2.5 at 10.2 µg/m³, while NO appears only as 6.9 µg/m³.
Overall the dataset offers a snapshot of Saint‑Malo’s air quality with recent coverage for most gases but limited temporal depth for nitrogen monoxide. Because the observations come from just three stations, conditions can differ across neighborhoods and times not captured by these 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 Saint‑Malo is based on four valid measurements and was refreshed recently, being Updated within 3 days; the latest update occurred at 2026-02-10T15:00:00+00:00. This snapshot reflects conditions captured by those sensors at that time, but 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
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| StMalo Courtoisville | no2 | 4.83 | µg/m³ | 2018-06-21 06:00 UTC |
| StMalo Courtoisville | o3 | 50.78 | µg/m³ | 2018-06-21 06:00 UTC |
| FR19081 | no2 | 3.8 | µg/m³ | 2018-04-25 14:00 UTC |
| FR19081 | o3 | 89.45 | µg/m³ | 2018-04-25 14:00 UTC |
| StMalo Rocabey | no | 6.9 | µg/m³ | 2024-03-11 09:00 UTC |
| StMalo Rocabey | no2 | 11.0 | µg/m³ | 2026-02-10 15:00 UTC |
| StMalo Rocabey | o3 | 37.1 | µg/m³ | 2026-02-10 15:00 UTC |
| StMalo Rocabey | pm10 | 6.6 | µg/m³ | 2026-02-09 03:00 UTC |
| StMalo Rocabey | pm25 | 10.2 | µg/m³ | 2026-02-09 03:00 UTC |