Air quality in Aiarako kuadrilla / Cuadrilla de Ayala, Autonomous Community of the Basque Country, Spain today

Mr. Duck’s Air Quality Score

Good air today for Aiarako kuadrilla / Cuadrilla de Ayala, Autonomous Community of the Basque Country, 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 Aiarako kuadrilla / Cuadrilla de Ayala is currently classified as Good. The primary pollutant identified is PM2.5. Six valid measurements have been recorded, showing a PM2.5 concentration of 1.0 µg/m³ and a PM10 concentration of 3.0 µg/m³. The reported PM2.5 level of 1.0 µg/m³ matches the reference value, and the PM10 level of 3.0 µg/m³ also matches its reference value. A total of six valid observations contributed to these results.

Data are displayed via OpenAQ and reflect the latest available values for the city. These figures correspond to the reference values used for assessment. The data snapshot is from 2026-02-23 12:00 UTC. No additional pollutants are highlighted in the current assessment. 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 Aiarako kuadrilla / Cuadrilla de Ayala contains measurements from 13 rows collected at two monitoring stations. All seven common urban pollutants are represented: carbon monoxide (CO), nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM₁₀), particulate matter ≤ 2.5 µm (PM₂.₅) and sulfur dioxide (SO₂). For CO, NO₂, O₃, PM₁₀, PM₂.₅ and SO₂ the most recent values were recorded on 2026‑02‑09 (or 2026‑01‑28 for NO₂) and are flagged as updated within the last 30 days, indicating a fairly fresh snapshot of the city’s air quality. The NO measurement is older, last updated on 2024‑01‑16, and comes from a single row, so its timeliness differs from the other pollutants.

Across the recent data the observed ranges are fairly wide. CO varies from 170 µg/m³ at its lowest to 300 µg/m³ at its highest, with a median of 235 µg/m³. NO₂ spans 12 µg/m³ to 17 µg/m³, median 14.5 µg/m³, while O₃ ranges between 50 µg/m³ and 66 µg/m³, median 58 µg/m³. Particulate matter shows a broader spread: PM₁₀ values run from 3 µg/m³ up to 21 µg/m³ (median 12 µg/m³) and PM₂.₅ from 1 µg/m³ to 16 µg/m³ (median 8.5 µg/m³). SO₂ is the most constrained, recorded between 3 µg/m³ and 5 µg/m³ with a median of 4 µg/m³. These figures illustrate that while most pollutants have recent coverage across the two stations, the concentration levels differ noticeably between gases and particles.

Because the dataset includes only a limited number of rows and one pollutant (NO) relies on older data, the picture it provides is a snapshot rather than a continuous record. Conditions in the city can therefore vary by location and time beyond what is captured here, especially for NO where recent measurements are not 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 dataset for Aiarako kuadrilla includes six valid measurements and is updated within 30 days. The latest data were recorded on 2026-02-09 at 15:00 UTC. Air‑quality values can differ across neighborhoods and change throughout the day, so this snapshot reflects conditions at the time of measurement only.

OpenAQ station rows