Air quality in Hillegom, South Holland, Netherlands today

Mr. Duck’s Air Quality Score

Good air today for Hillegom, South 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 Hillegom today is classified as Good. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 7.08 µg/m³ based on five valid readings reported through OpenAQ.

Overall conditions are within the range associated with the Good category, and no additional pollutants have been highlighted for today. 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 Hillegom air‑quality record draws on a single monitoring site that contributed five rows of data, each containing the same set of measurements. The dataset includes five pollutants: PM1, PM2.5, relative humidity, temperature and particle count (UM003). All values were recorded at the same moment – 2026-02-07 21:00 UTC – and are therefore fresh, falling within the “updated within 7 days” category for every parameter.

Because each pollutant shows identical minimum, median and maximum figures, the data describe a single snapshot rather than a range of observations. PM1 is reported as 3.0 µg/m³, while PM2.5 reads 7.08 µg/m³; relative humidity stands at 58.22 %, temperature at 11.90 °C and UM003 at 439.58 particles/cm³. The lack of variation across the five rows means there is no spread to describe – each metric is constant for this location and time.

With only one station represented, the coverage is limited to conditions at Hillegom West. While the timestamps are recent, the dataset does not capture spatial or temporal diversity within the city. Consequently, any single‑point reading may differ from conditions elsewhere in Hillegom or at other times of day. Users should keep in mind that this snapshot provides a precise but narrow view of the local atmosphere.

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 Hillegom is based on five valid measurements and has been updated within the past seven days, with the most recent reading recorded at 2026‑02‑07T21:00:00+00:00. This snapshot reflects conditions at specific monitoring points and times; air quality can differ across neighborhoods and throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows