Air quality in Dreux, Centre-Val de Loire, France today
Mr. Duck’s Air Quality Score
Good air today for Dreux, Centre-Val de 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 Dreux today is classified as Good. The primary pollutant identified is PM2.5 (fine particles).
Measurements show a PM2.5 reference value of 3.5 µg/m³ and a PM10 reference value of 5.1 µg/m³, based on four valid observations recorded by 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 Dreux air‑quality dataset contains 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). All values come from a single monitoring location identified as “Dreux Centre”, so the station count is two rows per pollutant, giving a total of ten data rows across the five substances.
Freshness varies by compound. The most recent NO reading dates back to 2024‑03‑11 09:00 UTC and is flagged as old data, while the other four pollutants have updates from 2026‑02‑10 15:00 UTC, each marked as updated within three days. This means that for NO the latest information is more than a year old, whereas NO₂, O₃, PM₁₀ and PM₂.₅ reflect conditions measured just a few days ago.
The recorded ranges show modest variability. NO values span from 0.5 to 0.8 µg/m³ with a median of 0.65 µg/m³; NO₂ ranges between 2.5 and 9.3 µg/m³, median 5.9 µg/m³; O₃ varies from 37.5 up to 65.8 µg/m³, median 51.65 µg/m³; PM₁₀ is between 5.1 and 11.6 µg/m³, median 8.35 µg/m³; and PM₂.₅ runs from 3.5 to 8.1 µg/m³, median 5.8 µg/m³. The inter‑percentile spread (10th–90th) is relatively tight for each pollutant, indicating that most recent measurements cluster close to the median values.
Because the dataset relies on a single site, spatial differences within Dreux are not captured, and the older NO record limits insight into current nitrogen monoxide levels. Users should keep in mind that conditions can differ across neighborhoods and over time, especially for pollutants with less recent data.
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 Dreux are based on four valid measurements and have been refreshed recently, with the latest update recorded on 2026‑02‑10 at 15:00 UTC; they are considered “Updated within 3 days.” This snapshot reflects conditions at the time of collection, but air quality can vary across different neighbourhoods and moments throughout the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| FR34046 | no | 0.5 | µg/m³ | 2024-01-29 17:00 UTC |
| FR34046 | no2 | 9.3 | µg/m³ | 2024-01-29 17:00 UTC |
| FR34046 | o3 | 37.5 | µg/m³ | 2024-01-29 17:00 UTC |
| FR34046 | pm10 | 11.6 | µg/m³ | 2024-01-29 17:00 UTC |
| FR34046 | pm25 | 8.1 | µg/m³ | 2024-01-29 17:00 UTC |
| Dreux Centre | no | 0.8 | µg/m³ | 2024-03-11 09:00 UTC |
| Dreux Centre | no2 | 2.5 | µg/m³ | 2026-02-10 15:00 UTC |
| Dreux Centre | o3 | 65.8 | µg/m³ | 2026-02-10 15:00 UTC |
| Dreux Centre | pm10 | 5.1 | µg/m³ | 2026-02-10 15:00 UTC |
| Dreux Centre | pm25 | 3.5 | µg/m³ | 2026-02-10 15:00 UTC |