Air quality in Leganés, Community of Madrid, Spain today

Mr. Duck’s Air Quality Score

Good air today for Leganés, Community of Madrid, 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 Leganés today is classified as Good. The primary pollutant identified is PM2.5 (fine particles).

Measurements from eight valid observations show a PM2.5 reference value of 1.0 and a PM10 reference value of 2.0, as reported by OpenAQ. These figures reflect the current monitoring results for the city.

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 Leganés air‑quality record draws on data from two monitoring sites that together contribute fourteen recent observations. For the five measured pollutants—nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀) and particulate matter 2.5 µm or less (PM₂.₅)—the most current timestamps are from 9 February 2026 at 15:00 UTC for NO₂, O₃, PM₁₀ and PM₂.₅, while the NO reading is older, dated 29 February 2024 at 00:00 UTC. This means that four of the five pollutants have fresh data updated within the last week, whereas nitrogen monoxide relies on a two‑year‑old entry.

The values show a modest spread for most constituents. NO₂ sits at a single reported value of 10 µg/m³, with its historic range spanning from 10 to 82 µg/m³ and the central 80 % of observations falling between 10 and about 68 µg/m³. Ozone is recorded at 50 µg/m³, matching both its median and maximum, while the lower decile sits near 11 µg/m³. PM₁₀’s latest measurement is 2 µg/m³; historically it has varied from 1 to 33 µg/m³, with 90 % of past data below roughly 27 µg/m³. PM₂.5 is reported at 1 µg/m³, its minimum and median, and has reached up to 19 µg/m³ in the past, with most values under 16 µg/m³. NO, the only pollutant with older data, shows a current value of 22 µg/m³, within a historical band of 4 to 22 µg/m³.

Overall, the dataset provides recent coverage for four pollutants across two stations, but the nitrogen monoxide figure is dated and should be interpreted with caution. Because observations come from only two locations, conditions can differ across neighborhoods and times not captured by these snapshots.

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 Leganés includes eight valid measurements and is refreshed regularly, having been updated within three days (last update: 2026‑02‑09 15:00 UTC). This snapshot reflects conditions at the time of collection; however, air quality can vary across different neighborhoods and times of day within the city. Users should consider these variations when interpreting the reported values.

OpenAQ station rows