Air quality in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France today
Mr. Duck’s Air Quality Score
Good air today for Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, 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 Chamonix‑Mont‑Blanc is assessed as Good today. The primary pollutant identified is PM10, which refers to coarser particulate matter measured in the atmosphere.
Five valid measurements were recorded, and the reference value for PM10 stands at 13.1 µg/m³. These 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 air‑quality record for Chamonix‑Mont‑Blanc draws on measurements from two monitoring sites and includes a total of seven recent data rows. Four pollutants are reported: nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃) and particulate matter ≤ 10 µm (PM10). The most up‑to‑date observations were recorded on 2026‑02‑10 at 15:00 UTC for NO₂, O₃ and PM10, while the latest NO value dates back to 2024‑03‑11 at 09:00 UTC. This means that three of the four pollutants have fresh readings within the past three days, whereas the NO data is older by more than a year.
Across the available records, NO concentrations vary from a low of 36.1 µg/m³ to a high of 122.6 µg/m³, with a median value of about 79 µg/m³ and the central 80 % of observations falling between roughly 45 µg/m³ and 114 µg/m³. NO₂ shows a narrower spread, ranging from 11.6 to 54.0 µg/m³; its median is 32.8 µg/m³ and the 10th‑90th percentile band runs from about 16 to 50 µg/m³. PM10 values are low and tightly clustered, moving between 9.6 and 13.1 µg/m³, with a median of 11.4 µg/m³ and most readings (10th‑90th percentiles) between roughly 10 and 12.8 µg/m³. Ozone is represented by a single recent measurement of 52.7 µg/m³, so no range can be derived for this pollutant at present.
Overall the dataset provides a modest but current picture of air quality in Chamonix‑Mont‑Blanc. While NO₂, O₃ and PM10 are captured with very recent timestamps, the older NO record highlights an uneven temporal coverage across pollutants. Users should keep in mind that conditions can differ between locations within the city and over time, especially for the less frequently updated NO 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 Chamonix‑Mont‑Blanc is based on five valid measurements and was refreshed recently, having been updated within three days (last update: 2026‑02‑10 15:00 UTC). This snapshot reflects conditions at the time of collection; air quality can differ across neighborhoods 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 |
|---|---|---|---|---|
| CHAMONIX | no | 36.1 | µg/m³ | 2024-03-11 09:00 UTC |
| CHAMONIX | no2 | 11.6 | µg/m³ | 2026-02-10 15:00 UTC |
| CHAMONIX | o3 | 52.7 | µg/m³ | 2026-02-10 15:00 UTC |
| CHAMONIX | pm10 | 13.1 | µg/m³ | 2026-02-09 03:00 UTC |
| BOSSONS | no | 122.6 | µg/m³ | 2024-03-11 09:00 UTC |
| BOSSONS | no2 | 54.0 | µg/m³ | 2026-02-10 15:00 UTC |
| BOSSONS | pm10 | 9.6 | µg/m³ | 2026-02-09 03:00 UTC |