Air quality in Cidade da Maia, Portugal today
Mr. Duck’s Air Quality Score
Good air today for Cidade da Maia, 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 Cidade da Maia is classified as Good today. The primary pollutant identified is PM10, with a reference value of 2.6 µg/m³ reported from the two valid measurements collected.
Data are shown via OpenAQ and reflect the current assessment 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 Cidade da Maia currently draws from a single monitoring location, D.Manuel II‑Vermoim, which supplies the three pollutants tracked on this page: nitrogen dioxide (NO2), particulate matter up to 10 microns (PM10) and fine particulate matter up to 2.5 microns (PM2.5). Because only one station contributes data, the coverage is limited to that specific site rather than representing the whole city’s spatial variation.
The most recent observations for NO2 and PM10 were recorded on 2026‑02‑10 at 08:00 UTC, so these two pollutants are refreshed within the last week. Both show a single reported value of 6.1 µg/m³ for NO2 and 2.6 µg/m³ for PM10, with identical minimum, median and maximum figures, indicating that only one measurement is available for each. In contrast, the PM2.5 reading dates back to 2019‑12‑24 at 16:00 UTC and remains unchanged at 0.0 µg/m³; this older entry is flagged as “Old data,” highlighting a gap of more than six years without newer measurements.
From the available numbers it can be seen that the range for each pollutant collapses to a single point, so there is no observed variability in the dataset. The freshness profile is uneven: two pollutants are up‑to‑date while the third is markedly outdated, which means any assessment of current fine‑particle conditions would rely on stale information. Overall, the data set consists of three rows—one per pollutant—from a single sensor, and while it provides a snapshot for NO2 and PM10, the limited station count and the old PM2.5 entry suggest that city‑wide air quality may differ across neighborhoods and times not captured here.
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 Cidade da Maia is based on two valid measurements and was refreshed recently, being Updated within 3 days; the latest values were recorded at 2026‑02‑10T08:00:00+00:00. This snapshot reflects conditions at the time of measurement but air quality can change across different neighbourhoods and moments throughout the day, so local variations may differ from what is displayed here.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| D.Manuel II-Vermoim | no2 | 6.1 | µg/m³ | 2026-02-10 08:00 UTC |
| D.Manuel II-Vermoim | pm10 | 2.6 | µg/m³ | 2026-02-10 08:00 UTC |
| D.Manuel II-Vermoim | pm25 | 0.0 | µg/m³ | 2019-12-24 16:00 UTC |