Air quality in Vila Nova de Gaia, Portugal today

Mr. Duck’s Air Quality Score

Moderate air today for Vila Nova de Gaia, 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 Vila Nova de Gaia is currently classified as Moderate. The primary pollutant identified is PM2.5. The measured concentration of PM2.5 is approximately 17.5 µg/m³, while PM10 is around 15.1 µg/m³.

Thirteen valid measurements contributed to this assessment, and the data are shown via OpenAQ. These concentrations are expressed in micrograms per cubic metre. The dataset includes thirteen recent observations that meet quality criteria. All reported values are presented in micrograms per cubic metre. A total of thirteen valid samples were used to calculate the averages. The data reflect conditions at the time of measurement. No additional pollutants are highlighted in this summary. 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 Vila Nova de Gaia brings together measurements from four monitoring sites, yielding a total of nineteen recent rows. All eight pollutants tracked by OpenAQ appear in the feed: nitrogen dioxide (NO2), ozone (O3), particulate matter of 1 µm (PM1), 2.5 µm (PM2.5) and 10 µm (PM10), relative humidity, temperature, and particle count (UM003). The newest timestamps are from 2026‑02‑10 22:00 UTC for PM1, PM2.5, humidity, temperature and UM003, and from 2026‑02‑10 21:00 UTC for PM10, NO2 and O3, indicating that the data have been refreshed within the last month.

Across the three stations that report particulate and meteorological variables, PM1 values range from 1.0 to 8.93 µg/m³ with a median of about 4.75 µg/m³, while PM2.5 spans a broader interval of 1.5 to 17.51 µg/m³ and a median near 9.48 µg/m³, showing a larger spread for finer particles. In contrast, PM10 is tightly clustered, varying only between 15.1 and 15.36 µg/m³ with a median of 15.23 µg/m³, reflecting limited variation at the coarser size. Relative humidity measurements sit between 64.28 % and 82.88 % (median 71.41 %), and temperature fluctuates from 12.03 °C to 16.97 °C (median 14.03 °C). The particle‑count metric UM003 shows the widest numeric range, from 315.5 to 1 763.13 particles/cm³, with a median around 1 010 particles/cm³.

Nitrogen dioxide, ozone and PM10 each come from a single station (Avintes), providing only one recent value—4.9 µg/m³ for NO2 and 50.0 µg/m³ for O3—so spatial coverage for these gases is uneven compared with the three‑site coverage for particulates and weather variables. Because the timestamps are all within a few days of each other, the dataset reflects conditions that were current as of early February 2026, but the limited number of stations for some pollutants means that city‑wide conditions 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 dataset for Vila Nova de Gaia includes 13 valid measurements and is updated within 30 days. The most recent update was on 2026-02-10 at 22:00 UTC. Air quality can vary by location and time within the city, so this snapshot may not reflect conditions everywhere.

OpenAQ station rows