Air quality in Marseille, Provence-Alpes-Côte d'Azur, France today

Mr. Duck’s Air Quality Score

Moderate air today for Marseille, Provence-Alpes-Côte d'Azur, 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 Marseille today is classified as Moderate. The primary pollutant identified is PM2.5, with a measured concentration of 9.82 µg/m³, while PM10 stands at 13.1 µg/m³ based on fifteen valid observations recorded by OpenAQ.

Data are presented for informational purposes only; 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 OpenAQ feed for Marseille includes measurements of carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM10), particulate matter ≤2.5 µm (PM2.5) and sulfur dioxide (SO₂). Across the city 38 data rows are reported from 14 distinct monitoring stations, but the number of recent observations varies by pollutant. CO, O₃, PM10, NO₂, PM2.5 and SO₂ each have a latest timestamp on 2026‑02‑10, all recorded within the last three days (the most recent values are 183 µg/m³ for CO at MARSEILLE 5 AVENUES, 64.3 µg/m³ for O₃ at the same site, 13.1 µg/m³ for PM10 and 29.6 µg/m³ for NO₂ at MARSEILLE ST LOUIS, 9.82 µg/m³ for PM2.5 on AMUSt Jeromeroof and 0.6 µg/m³ for SO₂ also at MARSEILLE 5 AVENUES). In contrast, the NO data are older, with the most recent entry dated 2024‑03‑11 09:00 UTC (5.9 µg/m³ at MARSEILLE ST LOUIS), indicating a gap of almost two years for that pollutant.

The range of values also differs markedly. PM2.5 spans from 0.0 to 15.3 µg/m³ with a median of 6.8 µg/m³, while NO₂ varies between 11.2 and 106.5 µg/m³ (median 32.3 µg/m³). CO shows the highest absolute levels, from 183 to 358 µg/m³ (median 270.5 µg/m³), whereas SO₂ remains very low, ranging only from 0.5 to 0.6 µg/m³ (median 0.55 µg/m³). The 10th‑percentile and 90th‑percentile figures illustrate that most recent measurements cluster tightly for CO, O₃ and SO₂, while NO₂ and PM2.5 exhibit broader spreads.

Overall, the dataset provides a fairly fresh snapshot for most pollutants but is uneven: five of the seven measured species have multiple recent rows, whereas NO relies on an outdated record. Consequently, city‑wide conditions can differ by location and time, especially for nitrogen oxide where current data are lacking.

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 Marseille are based on 15 valid measurements and have been updated within 3 days, with the latest refresh recorded at 2026‑02‑10T17:00:21+00:00. This snapshot reflects conditions captured by the monitoring network at that time; 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