Air quality in Saint-Omer, Hauts-de-France, France today

Mr. Duck’s Air Quality Score

Good air today for Saint-Omer, Hauts-de-France, France

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

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‑Omer today is classified as Good. The primary pollutant identified for this assessment is PM10, the coarser particulate matter fraction.

One valid measurement was recorded and the reference value for PM10 is 10.6 µg/m³. No data are available for PM2.5 at this time. 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 Saint‑Omer air‑quality record draws on nine measurement rows collected from two monitoring stations, covering carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm (PM10) and sulphur dioxide (SO₂). For each pollutant the dataset includes a minimum, median and maximum value observed across the rows, together with the most recent timestamp at which that figure was reported.

The newest data point is for PM10, recorded on 2026‑02‑10 15:00 UTC and showing a peak of 10.6 µg/m³; the next most recent timestamps are for O₃ (2025‑01‑20 10:00 UTC) and NO₂ (2024‑12‑09 11:00 UTC). All other pollutants have their latest entries older than one year, with CO last updated in 2017, NO in early 2024, and SO₂ back in late 2016. This means that for most of the suite the information reflects conditions measured months or years ago, so current levels may differ from those reported.

Across the available rows, concentrations show modest variability. NO₂ ranged from 2.0 to 10.2 µg/m³ with a median of 6.1 µg/m³, while O₃ spanned 14.6‑60.3 µg/m³ and centred around 37.4 µg/m³. PM10 values were tightly clustered between 5.6 and 10.6 µg/m³ (median 8.1). In contrast, CO is reported as a single constant value of 860 µg/m³, and NO and SO₂ each appear only once at 2.1 µg/m³ and 3.95 µg/m³ respectively. The dataset therefore provides broader coverage for the oxidants (NO₂, O₃, PM10) than for CO, NO or SO₂, where observations are sparse and dated. Users should keep in mind that Saint‑Omer’s air quality can vary by location and over time, and the present record reflects a snapshot rather than continuous real‑time monitoring.

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 Saint‑Omer reflects a single valid measurement and is Updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 15:00 UTC. This snapshot provides a brief view of current conditions; however, 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