Air quality in Llangréu / Langreo, Asturias, Spain today

Mr. Duck’s Air Quality Score

Moderate air today for Llangréu / Langreo, Asturias, Spain

⚠️ 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 Llangréu / Langreo is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 16.0 and a PM10 reference value of 29.0, based on 14 valid observations collected via OpenAQ.

These figures reflect the present conditions without implying any trend or cause. 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 Llangréu / Langreo contains measurements of carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM10), particulate matter ≤2.5 µm (PM2.5) and sulphur dioxide (SO₂). In total 19 individual rows have been recorded across three monitoring stations, giving a modest spatial coverage of the urban area.

The most recent values are from 2026‑02‑09 15:00 UTC for all pollutants except NO, whose latest entry dates back to 2024‑01‑31 00:00 UTC and is flagged as “old data”. CO shows the widest range, from a minimum of 240 µg/m³ up to a maximum of 900 µg/m³, with a median around 570 µg/m³. NO₂ values sit between 40 and 49 µg/m³, centering on a typical level of 45 µg/m³. O₃ is recorded from 7 to 25 µg/m³, with most observations near the lower end (median 14 µg/m³). PM10 spans 8 to 29 µg/m³, while PM2.5 varies between 8 and 16 µg/m³; both particle fractions have medians of roughly 10–12 µg/m³. SO₂ is the least variable, ranging from 4 to 9 µg/m³ with a median of 5 µg/m³.

Because only three stations contribute data, some pollutants are represented by fewer rows (e.g., CO and PM2.5 each have just two recent entries), whereas others like NO₂ and O₃ benefit from three recent records. The presence of one older NO measurement highlights that not all parameters are updated with the same frequency, so conditions in Llangréu / Langreo can differ across locations and times depending on which sensor data are currently available.

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 Llangréu/Langreo is based on 14 valid measurements and was refreshed Updated within 3 days, with the latest values recorded at 2026‑02‑09T15:00:00+00:00. This snapshot reflects conditions at a specific time and place; air quality can differ across neighborhoods and throughout the day, so the figures may not represent every location or moment in the city.

OpenAQ station rows