Air quality in Maassluis, South Holland, Netherlands today
Mr. Duck’s Air Quality Score
Moderate air today for Maassluis, 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 Maassluis is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 9.4 and a PM10 reference value of 14.1, based on three valid observations.
Data are shown via OpenAQ. 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 Maassluis air‑quality dataset contains six pollutant measurements collected at a single monitoring location, Maassluis‑Kwartellaan. The available compounds are nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀), particulate matter 2.5 µm or less (PM₂.₅) and sulphur dioxide (SO₂). Because the data set consists of only one row per pollutant, spatial coverage is limited to this single site; broader city‑wide conditions may differ.
Freshness varies considerably across the six substances. The most recent updates are for NO₂, PM₁₀ and PM₂.₅, all recorded on 2026-02-10 21:00 UTC, indicating that these three pollutants have current information within the last week. In contrast, the latest readings for NO (2024-03-25 22:00 UTC), O₃ (2024-09-10 22:00 UTC) and SO₂ (2024-03-25 22:00 UTC) are several months old, so they reflect older conditions. This uneven timestamp distribution means that recent snapshots exist for only half of the measured compounds.
The numeric values themselves show no variation within each pollutant because each record reports a single measurement that serves as both minimum and maximum. NO₂ is reported at 46.3 µg/m³, O₃ at 35.2 µg/m³, PM₁₀ at 14.1 µg/m³ and PM₂.5 at 9.4 µg/m³. Both NO and SO₂ have placeholder values of –999.0 µg/m³, indicating that valid concentrations are not available for these gases at the present time. Consequently, while recent data exist for three key pollutants, the overall picture is incomplete, and conditions across Maassluis may differ from what this single‑site snapshot shows.
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 Maassluis is based on three valid measurements and was refreshed within the past three days, with the latest update recorded at 2026‑02‑10 21:00 UTC. This snapshot reflects conditions at a specific time and place; air quality can differ across neighborhoods and change throughout the day, so values may not represent the entire city at any given moment.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Maassluis-Kwartellaan | no2 | 46.3 | µg/m³ | 2026-02-10 21:00 UTC |
| Maassluis-Kwartellaan | o3 | 35.2 | µg/m³ | 2024-09-10 22:00 UTC |
| Maassluis-Kwartellaan | pm10 | 14.1 | µg/m³ | 2026-02-10 21:00 UTC |
| Maassluis-Kwartellaan | pm25 | 9.4 | µg/m³ | 2026-02-10 21:00 UTC |