Air quality in Paços de Ferreira, Portugal today

Mr. Duck’s Air Quality Score

Good air today for Paços de Ferreira, 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 Paços de Ferreira is assessed as Good today. The primary pollutant identified is PM2.5 (fine particles).

Measurements from four valid observations show a PM2.5 reference value of 0.9 and a PM10 reference value of 17.8. These figures are presented through OpenAQ 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

The air‑quality dataset for Paços de Ferreira contains a single monitoring station that reports four pollutants: nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM10) and particulate matter 2.5 µm or less (PM2.5). All the latest observations were recorded on 2026‑02‑10 at 21:00 UTC, so the data are fresh within the past week for every pollutant.

For NO₂ the only reported value is 5.2 µg/m³; the minimum, median and maximum are identical, indicating that the station has a single recent measurement rather than a range of values over time. Ozone shows a similar pattern with a solitary reading of 44.0 µg/m³, while PM10 is recorded at 17.8 µg/m³ and PM2.5 at 0.9 µg/m³, each also having the same minimum, median and maximum. Because there is only one row per pollutant, statistical spread such as inter‑quartile ranges cannot be derived from this dataset.

The coverage is therefore limited to one location and a single snapshot for each pollutant, meaning that spatial or temporal variations across Paços de Ferreira are not captured here. While the timestamps are recent, the lack of multiple rows or older measurements means the data set does not reflect changes throughout the day or week. Users should keep in mind that conditions can differ in other parts of the city and at times outside the recorded moment.

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 are based on four valid measurements and were updated within 3 days, with the latest reading recorded at 2026‑02‑10T21:00:00+00:00. This snapshot reflects conditions at specific monitoring points and times; air quality can vary across different locations and moments throughout Paços de Ferreira.

OpenAQ station rows