Air quality in Braga, Portugal today
Mr. Duck’s Air Quality Score
Good air today for Braga, 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 Braga is classified as Good today. The primary pollutant measured is PM10, and the latest data show a reference value of 4.1 µg/m³ for this particle size. Four valid measurements were recorded to determine the current assessment.
Data are shown via OpenAQ and reflect the conditions at the time of sampling. 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 dataset for Braga currently contains measurements for three pollutants – nitrogen dioxide (NO₂), particulate matter up to 10 µm (PM₁₀) and ozone (O₃). In total five sensor rows are available, coming from two distinct monitoring sites. The most recent update across all records was on 2026‑02‑10 at 21:00 UTC, so the freshest data is less than a week old for every pollutant.
For NO₂ the values range from a low of 4.1 µg/m³ to a high of 30.3 µg/m³, with a median of 17.2 µg/m³ and the 10th‑percentile at about 6.7 µg/m³. Both recorded NO₂ points come from the Fr Bartolomeu Mártires‑S.Vitor station, which supplies the only recent readings for this gas. PM₁₀ shows a much tighter spread: measurements vary between 0.0 and 4.1 µg/m³, the median sits at 2.05 µg/m³ and the 90th‑percentile reaches 3.69 µg/m³. Like NO₂, PM₁₀ data are also sourced exclusively from Fr Bartolomeu Mártires‑S.Vitor. Ozone is represented by a single value of 42.0 µg/m³ recorded at the Frossos‑Braga site; this reading is both the minimum and maximum for O₃, reflecting that only one recent observation exists.
Overall the coverage is uneven: while NO₂ and PM₁₀ each have two recent rows, O₃ is captured by just one. All five rows are classified as “updated within 7 days,” meaning there are no older or unknown‑timestamp entries in the current set. Because the data come from only two locations, conditions can differ across other parts of Braga and at times not represented 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 Braga are based on four valid measurements and were refreshed recently, with the latest update recorded at 2026‑02‑10T21:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at the time of sampling; air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Fr Bartolomeu Mártires-S.Vitor | no2 | 30.3 | µg/m³ | 2026-02-10 21:00 UTC |
| Fr Bartolomeu Mártires-S.Vitor | pm10 | 4.1 | µg/m³ | 2026-02-10 21:00 UTC |
| Frossos-Braga | no2 | 4.1 | µg/m³ | 2026-02-10 21:00 UTC |
| Frossos-Braga | o3 | 42.0 | µg/m³ | 2026-02-10 21:00 UTC |
| Frossos-Braga | pm10 | 0.0 | µg/m³ | 2019-12-24 16:00 UTC |