Air quality in Laval, Pays de la Loire, France today
Mr. Duck’s Air Quality Score
Moderate air today for Laval, Pays de la Loire, 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 Laval today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles).
Measurements recorded by OpenAQ show a PM2.5 concentration of 10.3 µg/m³ based on two valid observations. No PM10 value is available for this assessment. 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 Laval includes measurements of five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), fine particulate matter (PM₂.5) and coarse particulate matter (PM₁₀). The information comes from seven recorded rows that originate from two monitoring stations, giving a modest spatial coverage across the city.
The most recent values are fairly fresh for NO₂ and PM₂.5, with updates on 2026‑02‑10 05:00 UTC and 2026‑02‑09 03:00 UTC respectively. Both of these pollutants show a narrow range: NO₂ varies from 3.5 to 5.8 µg/m³, with a median of 4.65 µg/m³, while PM₂.5 spans 10.3 to 12.6 µg/m³ and has a median of 11.45 µg/m³. In contrast, the data for NO, O₃ and PM₁₀ are older, last refreshed on 2024‑03‑11 06:00 UTC (NO) and 2025‑12‑09 23:00 UTC (O₃ and PM₁₀). These three pollutants each have a single recorded value – NO at 13.4 µg/m³, O₃ at 44.0 µg/m³ and PM₁₀ at 22.1 µg/m³ – so no range or median can be derived for them.
Overall, half of the rows (five out of seven) are classified as recent (updated within three to seven days), while two rows are considered old. This uneven temporal distribution means that current conditions for NO, O₃ and PM₁₀ may not reflect the latest atmospheric state, whereas NO₂ and PM₂.5 give a more up‑to‑date picture. Because only two stations contribute data, variations in air quality across different neighbourhoods of Laval could be missed, especially for the pollutants with older timestamps.
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 Laval are based on two valid measurements and were updated within 3 days, with the latest refresh recorded at 2026‑02‑10T05:00:00+00:00. This snapshot reflects conditions at the time of sampling; 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 |
|---|---|---|---|---|
| MAZAGRAN | no | 13.4 | µg/m³ | 2024-03-11 06:00 UTC |
| MAZAGRAN | no2 | 5.8 | µg/m³ | 2025-12-09 23:00 UTC |
| MAZAGRAN | o3 | 44.0 | µg/m³ | 2025-12-09 23:00 UTC |
| MAZAGRAN | pm10 | 22.1 | µg/m³ | 2025-12-09 23:00 UTC |
| MAZAGRAN | pm25 | 12.6 | µg/m³ | 2025-12-09 23:00 UTC |
| LAVAL-La Paix | no2 | 3.5 | µg/m³ | 2026-02-10 05:00 UTC |
| LAVAL-La Paix | pm25 | 10.3 | µg/m³ | 2026-02-09 03:00 UTC |