Air quality in La Roche-sur-Yon, Pays de la Loire, France today
Mr. Duck’s Air Quality Score
Moderate air today for La Roche-sur-Yon, 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 La Roche‑sur‑Yon is currently classified as moderate. The primary pollutant measured today is PM2.5, with a reference concentration of 16.6 µg/m³, while the accompanying PM10 level stands at 24.2 µg/m³. Four valid measurements contribute to this assessment and are displayed 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 La Roche‑sur‑Yon air‑quality feed contains data for five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter up to 10 µm (PM₁₀) and particulate matter up to 2.5 µm (PM₂.₅). All of these measurements come from a single monitoring site, identified as DELACROIX, which accounts for the five rows of data recorded in the OpenAQ database.
The timestamps show that most of the recent observations are very fresh: NO₂, O₃, PM₁₀ and PM₂.₅ were all last updated on 2026‑02‑09 at 23:00 UTC, meaning they reflect conditions from just a few days ago. The NO reading is older, with its most recent value logged on 2024‑03‑11 at 08:00 UTC, so it does not provide as current a picture of that specific pollutant. Because each pollutant has only one recorded value, the minimum, median and maximum are identical for every metric, indicating no observed variability within this limited dataset.
Overall, the data set is small – five rows from one station – and while four of the pollutants have up‑to‑date measurements, the single NO entry is dated nearly two years ago. This means that city‑wide conditions can differ across neighborhoods or over time, and the current snapshot may not capture those variations fully. Users should keep in mind that the available numbers represent a very narrow sampling window rather than a comprehensive, continuously updated profile of air quality throughout La Roche‑sur‑Yon.
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 La Roche‑sur‑Yon is based on four valid measurements and was refreshed recently, having been updated within three days (last update: 2026‑02‑09T23:00:00+00:00). This snapshot reflects conditions at the time of sampling; air quality can vary across different neighbourhoods and times of day within the city, so values may not represent every location or moment.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| DELACROIX | no | 2.8 | µg/m³ | 2024-03-11 08:00 UTC |
| DELACROIX | no2 | 0.5 | µg/m³ | 2026-02-09 23:00 UTC |
| DELACROIX | o3 | 81.6 | µg/m³ | 2026-02-09 23:00 UTC |
| DELACROIX | pm10 | 24.2 | µg/m³ | 2026-02-09 23:00 UTC |
| DELACROIX | pm25 | 16.6 | µg/m³ | 2026-02-09 23:00 UTC |