Air quality in Saint-Étienne-de-Montluc, Pays de la Loire, France today
Mr. Duck’s Air Quality Score
Good air today for Saint-Étienne-de-Montluc, 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 Saint‑Étienne‑de‑Montluc is classified as Good today. The primary pollutant measured is PM2.5, with a reported concentration of 6.1 µg/m³. In addition, the PM10 level is recorded at 6.9 µg/m³ based on four valid observations.
Data are shown via OpenAQ and reflect the current monitoring results for this location. 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 Saint‑Étienne‑de‑Montluc currently draws on a single monitoring station that supplies five separate pollutant measurements. The dataset therefore consists of five rows – one for each of the measured species NO, NO₂, PM10, PM2.5 and SO₂ – all reported from the same site (S ETIENNE DE MONTLUC). Freshness varies across the series: four of the five entries have been updated within the past seven days, while the remaining row (the NO value) dates back to 2024‑03‑11 06:00 UTC. This mix means that most of the recent picture reflects conditions measured on 2026‑02‑09, but a small portion is older than two years.
Across the pollutants the recorded concentrations are tightly clustered, with each metric showing essentially a single observed value. NO registers at 0.5 µg/m³, NO₂ at 6.3 µg/m³, PM10 at 6.9 µg/m³, PM2.5 at 6.1 µg/m³ and SO₂ at 0.9 µg/m³. Because each pollutant has only one measurement point, the minimum, median and maximum are identical for every species, indicating no observable spread in this snapshot. The data therefore describe a very narrow range of values rather than a distribution.
The limited station coverage – just one location – means that spatial variations within Saint‑Étienne‑de‑Montluc are not captured. While four pollutants have recent updates (2026‑02‑09 03:00 UTC), the NO reading is considerably older, highlighting an uneven temporal completeness across the dataset. Users should keep in mind that conditions can differ by neighbourhood and time of day, and the current figures represent a point‑in‑time snapshot rather than a comprehensive view of the city’s air quality.
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 for Saint‑Étienne‑de‑Montluc are based on four valid measurements and were refreshed recently, with the latest update recorded on 2026‑02‑09 at 03:00 UTC (updated within three days). This snapshot reflects conditions at the time of sampling; air quality can vary across different neighborhoods and times of day within the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| S ETIENNE DE MONTLUC | no | 0.5 | µg/m³ | 2024-03-11 06:00 UTC |
| S ETIENNE DE MONTLUC | no2 | 6.3 | µg/m³ | 2026-02-09 03:00 UTC |
| S ETIENNE DE MONTLUC | pm10 | 6.9 | µg/m³ | 2026-02-09 03:00 UTC |
| S ETIENNE DE MONTLUC | pm25 | 6.1 | µg/m³ | 2026-02-09 03:00 UTC |
| S ETIENNE DE MONTLUC | so2 | 0.9 | µg/m³ | 2026-02-09 03:00 UTC |