Air quality in Matosinhos, Portugal today

Mr. Duck’s Air Quality Score

Good air today for Matosinhos, Portugal

⚠️ 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 Matosinhos is currently classified as Good. The primary pollutant measured today is PM10, with a reference concentration of 34.0 µg/m³ reported from eight valid observations.

Data are shown via OpenAQ and reflect the latest available readings for this location. 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 Matosinhos contains data on five measured pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM10) and sulphur dioxide (SO₂). Sixteen rows of sensor readings are available, but they come from only six distinct monitoring stations, so the spatial coverage is limited. All the latest updates were recorded on 2026‑02‑10 at 21:00 UTC, meaning the most recent values for each pollutant are less than a week old.

PM10 shows a median concentration of 18.4 µg/m³ with observed values ranging from –1.0 to 34.0 µg/m³; the 10th percentile is 2.85 and the 90th percentile reaches 32.8, indicating that most measurements cluster around the middle of this spread. Ozone has a median of 34.5 µg/m³, minimum 0.0 and maximum 58.0 µg/m³, with the upper tail extending to the 90th percentile at 56.5 µg/m³. NO₂ values are tighter, ranging from 6.1 to 23.2 µg/m³ around a median of 19.3 µg/m³; the lower 10th percentile is 8.74 and the upper 90th percentile 22.42. Sulphur dioxide records an unusual minimum of –1.0 µg/m³ (the only negative reading) and a maximum of 18.0 µg/m³, median 8.5 µg/m³, with most data between 0.9 and 16.1 µg/m³. Carbon monoxide data consist of a single placeholder value of –1000.0 µg/m³ from one station, which does not represent a realistic measurement.

Overall the dataset is recent but sparse: only four pollutants have multiple observations (PM10, O₃, NO₂, SO₂), while CO is represented by a single anomalous entry. The number of rows that are older than seven days or lack timestamps is zero, yet the limited station count means conditions can differ across neighborhoods and times not captured by these snapshots.

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 Matosinhos is based on eight valid measurements and was updated within 3 days, with the latest reading recorded at 2026‑02‑10T21:00:00+00:00. This snapshot reflects conditions at the time of collection; air quality can differ across neighbourhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows