Air quality in Castricum, North Holland, Netherlands today
Mr. Duck’s Air Quality Score
Unhealthy for sensitive groups for Castricum, North Holland, Netherlands
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Castricum today falls into the USG category. The primary pollutant identified is PM2.5, with a measured concentration of 40.09 µg/m³ based on five valid observations reported through OpenAQ.
Data for this assessment are limited to the available measurements and do not include additional pollutants. 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 Castricum air‑quality record currently draws from a single monitoring location, so all figures represent one set of observations rather than city‑wide coverage. Five pollutants are reported: PM1 at 23.995 µg/m³, PM2.5 at 40.095 µg/m³, relative humidity at 69.20 %, temperature at 10.73 °C and particle count (UM003) at 4 625.06 particles/cm³. Each of these measurements was last updated on 2026‑02‑10 at 22:00 UTC, meaning the data are fresh within the past week.
All five variables show identical minimum, median and maximum values because only one row is available; there is no spread to describe variability over time or across sites. The reported relative humidity of roughly 69 % and temperature near 11 °C reflect typical early‑winter conditions for North Holland. Because the dataset contains just one station, any spatial differences in air quality across Castricum cannot be captured here.
In summary, the data set includes a complete suite of common pollutants but is limited to a single observation point, with all values recorded at the same recent timestamp and no range of historical readings. Consequently, while the figures give an up‑to‑date snapshot for that location, they do not represent broader city‑wide trends or variations.
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 Castricum is based on five valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T22:00:00+00:00 (updated within 3 days). This snapshot reflects conditions captured at that time; however, air quality can vary across different neighbourhoods and throughout the day, so actual exposure may differ from what is displayed here.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Garden | pm1 | 23.995000012715654 | µg/m³ | 2026-02-10 22:00 UTC |
| Garden | pm25 | 40.09499969482422 | µg/m³ | 2026-02-10 22:00 UTC |
| Garden | relativehumidity | 69.19866638183593 | % | 2026-02-10 22:00 UTC |
| Garden | temperature | 10.726333379745483 | c | 2026-02-10 22:00 UTC |
| Garden | um003 | 4625.058333333333 | particles/cm³ | 2026-02-10 22:00 UTC |