Air quality in Nijmegen, Gelderland, Netherlands today

Mr. Duck’s Air Quality Score

Good air today for Nijmegen, Gelderland, Netherlands

⚠️ 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 Nijmegen today is classified as Good. The primary pollutant measured is PM2.5 (fine particles). According to the latest data, the PM2.5 concentration stands at 3.7314 µg/m³, while the larger particulate matter (PM10) registers a value of 10.83 µg/m³. These figures are based on eight valid measurements collected through OpenAQ.

Overall, conditions meet the criteria for a Good air‑quality rating. 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 dataset for Nijmegen includes six measured pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), fine particulate matter (PM2.5) and coarse particulate matter (PM10). Data come from two monitoring stations, each providing a row of observations; the total number of rows is ten. Freshness varies by pollutant: the most recent NO, NO₂, PM2.5, PM10 and O₃ values were all recorded on 2026-02-10 at 21:00 UTC, while the CO reading dates back to 2021-04-20 at 21:00 UTC, making it the only older entry in the set.

Across the pollutants, observed concentrations span a modest range. NO ranges from a low of 1.48 µg/m³ to a high of 2.92 µg/m³ with a median of 2.2 µg/m³; NO₂ varies between 15.19 and 16.48 µg/m³, median 15.835 µg/m³. PM2.5 shows the widest spread, from 1.3304 up to 3.7314 µg/m³, median 2.5309 µg/m³. Both PM10 and O₃ have a single reported value – 10.83 µg/m³ for PM10 and 34.58 µg/m³ for O₃ – reflecting that only one station contributed recent data for these pollutants. The CO figure is recorded as -995.0 µg/m³, indicating an invalid or placeholder measurement rather than a true concentration.

Overall, the dataset provides recent coverage for most gases and particulates, but the limited number of stations (two) and the outdated CO entry mean that city‑wide conditions may differ across neighborhoods and times not captured here. Users should keep in mind that the available numbers represent snapshots from specific locations rather than continuous city‑wide 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 Nijmegen are based on eight valid measurements and were updated within 3 days, with the latest reading recorded at 2026‑02‑10T21:00:00+00:00. This snapshot reflects conditions at a specific time and location; air quality can differ across neighbourhoods and change throughout the day, so values may not represent the entire city at any given moment.

OpenAQ station rows