Air quality in IJmuiden, North Holland, Netherlands today

Mr. Duck’s Air Quality Score

Moderate air today for IJmuiden, North Holland, 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 IJmuiden today falls into the Moderate category. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 35.32 µg/m³ and a PM10 reference value of 16.8 µg/m³, based on nine valid observations.

Data are displayed via OpenAQ and reflect the current assessment for the city. 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 IJmuiden air‑quality record draws on data from two monitoring sites and a total of twelve individual rows. All eight measured pollutants are represented: carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), sulphur dioxide (SO₂), particulate matter in three size fractions (PM₁, PM₂·₅, PM₁₀), relative humidity and temperature (the latter is not listed among the latest values but is part of the sensor suite). The most recent observations are from 2026‑02‑10, with timestamps ranging between 21:00 and 22:00 UTC, so the freshest data are less than a day old for every pollutant except NO, which only has an entry dated 2024‑03‑25 and shows a placeholder value of –999.0 µg/m³, indicating that a valid recent measurement is not available.

Across the pollutants the recorded values show a modest spread. PM₁₀ varies from a low of 16.8 µg/m³ to a high of 57.5 µg/m³, with a median around 37 µg/m³; PM₂·₅ ranges between 11.4 and 35.3 µg/m³, median roughly 23 µg/m³; CO is reported at a single level of 537 µg/m³, while NO₂ and SO₂ each have one recent reading of 39 µg/m³ and 1.9 µg/m³ respectively. Relative humidity is consistently high at about 75 % in the latest sample.

The dataset therefore offers full coverage for most pollutants with very recent measurements, but it is uneven: NO lacks current data, and temperature values are not included among the freshest entries. Because only two stations contribute, conditions captured here reflect a limited spatial snapshot of IJmuiden; variations elsewhere in the city or over longer periods may differ from these point‑in‑time readings.

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 dataset for IJmuiden includes nine valid measurements and is updated within three days, with the most recent refresh on 2026‑02‑10 at 22:00 UTC. While these figures give a reliable overview of current conditions, air quality can differ across neighborhoods and change throughout the day, so individual experiences may vary from the reported values.

OpenAQ station rows