Air quality in Altsasu / Alsasua, Navarre, Spain today

Mr. Duck’s Air Quality Score

Good air today for Altsasu / Alsasua, Navarre, 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 Altsasu / Alsasua is currently classified as Good. The primary pollutant identified is PM10, with a measured reference value of 6.0 µg/m³ based on eight valid observations.

Data are shown via OpenAQ and reflect the latest available readings for this location. 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 Altsasu / Alsasua air‑quality record contains six measured pollutants – carbon monoxide (CO), nitrogen oxides (NO and NO₂), ozone (O₃), particulate matter 10 µm or less (PM10) and sulphur dioxide (SO₂). All data come from two monitoring stations, giving a total of 17 recent rows. For five of the six pollutants the most recent observations are from 2026‑02‑09 15:00 UTC, showing that the dataset is currently up‑to‑date within the last seven days. The NO reading is older, with its latest value recorded on 2024‑02‑22 00:00 UTC.

Across the five fresh pollutants the observed concentrations span a fairly wide range. CO values are clustered at the high end of the scale, with a minimum of 700 µg/m³, a median of 800 µg/m³ and a maximum also at 800 µg/m³, indicating little variability in recent measurements. NO₂ shows more spread, ranging from 13 to 19 µg/m³, with the median (18 µg/m³) close to the upper quartile (p90 = 18.8 µg/m³). O₃ values are tightly grouped between 49 and 54 µg/m³, while PM10 varies from 6 up to 26 µg/m³, a median of 15 µg/m³ and a p90 of 23.8 µg/m³ that points to occasional higher dust levels. SO₂ is the lowest‑range pollutant, recorded between 2 and 4 µg/m³ with a median of 3 µg/m³.

The dataset therefore offers recent, detailed snapshots for most pollutants but has limited temporal depth for NO, where only an older entry is available. Because the data come from just two stations, conditions can differ across neighbourhoods and times not captured by these rows.

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 Altsasu/Alsasua is based on eight valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑09T15:00:00+00:00 (Updated within 3 days). This snapshot reflects conditions at the time of sampling; 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