Air quality in Westmaas, South Holland, Netherlands today
Mr. Duck’s Air Quality Score
Good air today for Westmaas, South 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 Westmaas is classified as Good today. The main pollutant identified is PM10, with measurements indicating a concentration of about 18.5 µg/m³ based on four valid observations reported through OpenAQ.
Overall conditions meet the Good category criteria and no additional pollutants are highlighted at this time. 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 record for Westmaas currently includes four measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃) and particulate matter up to 10 µm (PM₁₀). All of these come from a single monitoring location, identified as Westmaas‑Groeneweg, so the dataset represents one spatial point rather than a citywide network. The most recent observation for each pollutant was recorded on 2026-02-10 at 21:00 UTC, which falls within the “updated within seven days” freshness category used by OpenAQ.
Because there is only one row of data, the statistical spread for every compound is identical: the minimum, median and maximum values are the same. NO registers a concentration of 0.59 µg/m³, NO₂ shows 14.17 µg/m³, O₃ measures 38.21 µg/m³ and PM₁₀ records 18.51 µg/m³. These single‑value summaries mean there is no observed variability across time or location in the current set, limiting any assessment of short‑term fluctuations.
In practical terms, the dataset offers a snapshot rather than a trend line: all four pollutants are present, but coverage is limited to one site and the latest reading is just over a week old. Consequently, while the numbers give an immediate picture of conditions at Westmaas‑Groeneweg on 2026-02-10, they do not capture how air quality might differ elsewhere in the municipality or change throughout the day. Users should keep in mind that local conditions can vary by place and time, and additional monitoring points would be needed for a more comprehensive view.
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 Westmaas is based on four valid measurements and was refreshed within the past three days, with the latest update recorded at 2026‑02‑10T21:00:00+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
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Westmaas-Groeneweg | no | 0.59 | µg/m³ | 2026-02-10 21:00 UTC |
| Westmaas-Groeneweg | no2 | 14.17 | µg/m³ | 2026-02-10 21:00 UTC |
| Westmaas-Groeneweg | o3 | 38.21 | µg/m³ | 2026-02-10 21:00 UTC |
| Westmaas-Groeneweg | pm10 | 18.51 | µg/m³ | 2026-02-10 21:00 UTC |