Air quality in Porto, Portugal today
Mr. Duck’s Air Quality Score
Good air today for Porto, Portugal
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Porto is currently classified as Good. The main pollutant identified is PM10, with a measured reference value of 3.2 µg/m³ based on two valid observations reported through OpenAQ.
Overall conditions meet the criteria for a Good rating according to the available data. 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
Porto’s air‑quality record draws on a single monitoring site – the Francisco Sá Carneiro‑Campanha station – which supplies data for three pollutants. Carbon monoxide (CO) is reported as –1000.0 µg/m³, nitrogen dioxide (NO2) at 15.0 µg/m³ and particulate matter up to 10 µm (PM10) at 3.2 µg/m³. All three measurements share the same most‑recent timestamp of 2026‑02‑10 21:00 UTC, meaning the dataset was refreshed within the last seven days.
Because only one station contributes, the spatial coverage for Porto is very limited; there are no additional rows to show variation across neighbourhoods or micro‑environments. The numeric spread also reflects this narrow sampling: CO’s minimum, median and maximum are identical at –1000.0 µg/m³, indicating a single recorded value rather than a range. NO2 shows the same uniformity with its minimum, 10th percentile, median, 90th percentile and maximum all equal to 15.0 µg/m³. PM10 likewise presents a solitary figure of 3.2 µg/m³ across every statistical marker.
Overall, the data set is fresh but sparse: the most recent update is recent for each pollutant, yet only one observation per pollutant exists, and no older or unknown‑age entries are present. Consequently, while the timestamps suggest up‑to‑date reporting, the lack of multiple stations means that conditions can differ across Porto and the figures shown may not capture those local 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 Porto is based on two valid measurements and was updated within three days, with the latest refresh 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 throughout the day, so values may not represent current or citywide levels.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Francisco Sá Carneiro-Campanha | no2 | 15.0 | µg/m³ | 2026-02-10 21:00 UTC |
| Francisco Sá Carneiro-Campanha | pm10 | 3.2 | µg/m³ | 2026-02-10 21:00 UTC |