Air quality in Loures, Portugal today

Mr. Duck’s Air Quality Score

Good air today for Loures, 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 Loures today falls within the Good category according to the latest assessment. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 0.658 µg/m³ based on nine valid observations reported through OpenAQ.

No other pollutants reached measurable levels in this dataset, and the overall evaluation reflects the limited number of readings available. 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 Loures data set contains eight measured variables – nitrogen dioxide (NO₂), ozone (O₃), particulate matter 1 µm (PM1), particulate matter 10 µm (PM10), particulate matter 2.5 µm (PM2.5), relative humidity, temperature and the particle count UM003 – drawn from three monitoring stations across the municipality. In total there are ten recent rows of observations, with the most up‑to‑date values recorded on 2026-02-10 at either 21:00 UTC (for NO₂, O₃ and PM10) or 22:00 UTC (for the remaining six parameters). All timestamps fall within the last seven days, so the data are fresh for each pollutant.

The numeric spread differs markedly between gases and particles. For NO₂ the values range from a low of 5.2 µg/m³ to a high of 15.4 µg/m³, with a median of 10.3 µg/m³; ozone shows a tighter band, varying only between 37.0 and 44.0 µg/m³ and centering on 40.5 µg/m³. By contrast the particulate measurements are extremely limited: PM10 is reported as –1.0 µg/m³ for all rows, indicating an unavailable or placeholder reading, while PM1 and PM2.5 each have a single constant value (0.0667 µg/m³ and 0.6582 µg/m³ respectively) from the Santa Iria de Azoia station. The auxiliary variables are also singular – relative humidity sits at 72.07 %, temperature at 17.91 °C and UM003 at 159.61 particles/cm³, each reflecting a single snapshot.

Because the particulate data are sparse and PM10 is effectively missing, any assessment of fine‑particle conditions in Loures must be treated with caution. The gas measurements (NO₂ and O₃) provide a more complete picture, covering three stations and showing modest variability within the recent 24‑hour window. Users should keep in mind that air quality can differ across neighborhoods and over time, and the current dataset captures only a brief moment for each pollutant.

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 Loures is based on nine valid measurements and was refreshed recently, having been updated within three days (last update 2026‑02‑10T22:00:00+00:00). This snapshot reflects conditions at the time of collection; air quality can differ across neighbourhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows