Air quality in Terena (São Pedro), Portugal today
Mr. Duck’s Air Quality Score
Good air today for Terena (São Pedro), 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 Terena (São Pedro) is currently classified as Good. The primary pollutant identified is PM2.5. The reference value for PM2.5 is 1.7 µg/m³ and for PM10 it is 0.7 µg/m³. These figures are based on five valid measurements. Data for this assessment are shown via OpenAQ.
The reported concentrations align with the reference values, indicating that particulate levels are within the range associated with the Good category. No additional pollutants have been highlighted in the current dataset. Both PM2.5 and PM10 observations are included, offering a view of fine and coarse particulate matter. All values are expressed in micrograms per cubic meter. 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 current OpenAQ feed for Terena (São Pedro) contains five data rows drawn from a single monitoring station. All five common urban pollutants are represented: nitrogen dioxide, ozone, particulate matter up to 10 µg/m³, fine particulate matter up to 2.5 µg/m³, and sulfur dioxide. Because the dataset originates from one location, it captures only the air quality at that specific site rather than a city‑wide picture.
Regarding data freshness, three of the five rows were recorded within the last thirty days, while the remaining two are classified as older. The most recent measurements for nitrogen dioxide, PM10 and PM2.5 were logged on 2026-02-10 21:00 UTC, indicating a fairly current snapshot for those compounds. In contrast, the ozone and sulfur dioxide values date back to 2026-01-24 11:00 UTC, which the system flags as old data. No entries are marked as today, within three days, or within seven days, highlighting a modest update frequency across the pollutant set.
The numeric results themselves show no internal variation: each pollutant has a single reported value that also serves as its minimum, median and maximum. Nitrogen dioxide registers at 1.0 µg/m³, ozone at 38.0 µg/m³, PM10 at 0.7 µg/m³, PM2.5 at 1.7 µg/m³, and sulfur dioxide at 6.0 µg/m³. Because the dataset consists of isolated points rather than a distribution, it does not reveal any range or trend. Users should keep in mind that air quality can differ across neighborhoods and times of day, and the limited coverage here may not reflect the full atmospheric conditions throughout Terena.
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
This dataset includes five valid measurements and has been updated within 30 days. The latest update was recorded on 2026-02-10 at 21:00 UTC. Values reflect conditions at the monitoring stations at the time of sampling and should be interpreted as a snapshot rather than a continuous representation. Air quality can vary by location and time within Terena (São Pedro).
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Terena | no2 | 1.0 | µg/m³ | 2026-02-10 21:00 UTC |
| Terena | o3 | 38.0 | µg/m³ | 2026-01-24 11:00 UTC |
| Terena | pm10 | 0.7 | µg/m³ | 2026-02-10 21:00 UTC |
| Terena | pm25 | 1.7 | µg/m³ | 2026-02-10 21:00 UTC |
| Terena | so2 | 6.0 | µg/m³ | 2026-01-24 11:00 UTC |