Air quality in Basel, Basel-City, Switzerland today

Mr. Duck’s Air Quality Score

Good air today for Basel, Basel-City, Switzerland

⚠️ 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 today in Basel is classified as Good. The main pollutant identified is PM10.

Based on five valid measurements, the PM10 reference value is 8.8592. 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 Basel air‑quality dataset currently includes three measured pollutants – nitrogen dioxide (NO₂), particulate matter 10 µm or smaller (PM₁₀) and ozone (O₃). Data come from a total of five monitoring rows, but the distribution is uneven: two rows report NO₂, two rows report PM₁₀ and only one row reports O₃. All observations were last updated on 2026‑02‑10 at 20:00 UTC, so the freshest data are less than a week old for every pollutant.

For NO₂ the recorded values range from a minimum of 31.65 µg/m³ to a maximum of 34.87 µg/m³, with a median of about 33.26 µg/m³ and the 10th‑percentile at 31.97 µg/m³ and the 90th‑percentile at 34.54 µg/m³. PM₁₀ shows a tighter spread: values run from 8.38 to 8.86 µg/m³, median 8.62 µg/m³, 10th‑percentile 8.43 µg/m³ and 90th‑percentile 8.81 µg/m³. O₃ is represented by a single measurement of exactly 20.02 µg/m³ at the Basel‑St‑Johann site.

Because only one row supplies ozone data, city‑wide O₃ conditions are less well captured than NO₂ or PM₁₀, which each have two monitoring points. Nevertheless, all stations report recent values, so the snapshot reflects current concentrations rather than historical averages. The narrow ranges for both NO₂ and PM₁₀ suggest relatively consistent levels across the monitored locations on the reporting day, while the single ozone reading provides a point‑in‑time reference that may differ elsewhere in Basel.

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 Basel includes five valid measurements and is refreshed regularly, having been updated within the past three days (last update: 2026‑02‑10 20:00 UTC). These figures represent a brief snapshot of air quality across the city; conditions can differ by specific neighbourhoods and change throughout the day.

OpenAQ station rows