Air quality in Grande-Synthe, Hauts-de-France, France today

Mr. Duck’s Air Quality Score

Good air today for Grande-Synthe, 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 Grande‑Synthe today is classified as Good. The primary pollutant measured is PM10, with a reference concentration of 7.6 µg/m³ based on three valid observations recorded by OpenAQ.

These measurements indicate that particulate levels are within the range associated with the Good category 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 dataset for Grande‑Synthe contains five measured pollutants – carbon monoxide (CO), nitrogen oxides (NO and NO₂), particulate matter 10 µm or less (PM₁₀) and sulfur dioxide (SO₂). All data come from two monitoring stations, giving a total of nine recent rows. Freshness varies: the most up‑to‑date readings are from 2026‑02‑10 15:00 UTC for CO, PM₁₀ and SO₂, while NO₂ was last refreshed on 2026‑01‑13 13:00 UTC. The only older entry is NO, recorded on 2024‑03‑11 03:00 UTC, which means that for this pollutant the information is more than a year out of date.

Across the recent pollutants the observed ranges are modest. CO spans from 117.8 to 150.0 µg/m³ with a median of about 133.9 µg/m³, indicating relatively consistent levels within the dataset. NO₂ values range between 5.13 and 10.6 µg/m³, median 7.87 µg/m³, while PM₁₀ stays tightly clustered from 7.6 to 8.78 µg/m³ (median 8.19 µg/m³). SO₂ is the most stable, varying only from 0.75 to 0.80 µg/m³ with a median of 0.775 µg/m³. In contrast, NO shows a single constant value of 0.2 µg/m³ because only one older measurement is available.

Overall the dataset offers recent coverage for four of the five pollutants, but the age of the NO data and the limited number of stations mean that conditions can differ across neighbourhoods and times not captured here. Users should keep in mind that while the numbers give a snapshot of current concentrations for most species, they do not reflect the full spatial or temporal variability within Grande‑Synthe.

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 Grande‑Synthe is based on three valid measurements and was refreshed within the past three days, with the latest update recorded at 2026‑02‑10T15:00:00+00:00. This snapshot reflects conditions at a specific time and place; air quality can differ across neighborhoods and change throughout the day, so values may not represent the entire city at any given moment.

OpenAQ station rows