Air quality in Riehen, Basel-City, Switzerland today

Mr. Duck’s Air Quality Score

Good air today for Riehen, 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 in Riehen is classified as Good today. The primary pollutant measured is PM2.5, with a recorded concentration of 1.65 µg/m³ based on five valid observations reported through OpenAQ.

No other pollutants reached the reporting threshold, and the data set does not include a PM10 value for this period. 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 Riehen air‑quality record draws on data from two monitoring sites that together provide twelve rows of observations across six measured variables: PM1, PM10, PM2.5, relative humidity, temperature and the particle count UM003. The most recent measurements for five of these pollutants were recorded on 2026‑02‑10 at 21:00 UTC, while the latest PM10 value dates back to 2025‑01‑13 at 23:00 UTC, indicating that PM10 coverage is older than the other parameters.

Across the dataset the concentrations show a fairly wide spread. PM1 values range from just over one microgram per cubic metre up to about twenty‑three µg/m³, with a median near twelve µg/m³; PM2.5 spans roughly 1.7 to 34 µg/m³ and sits at a median of eighteen µg/m³. The particle count UM003 varies between three hundred and eighty‑four and one thousand two hundred thirty‑five particles per cubic centimetre, with a typical (median) level around eight hundred particles/cm³. Relative humidity measurements stay within a narrow band of roughly fifty‑six to sixty‑two percent, centering on about fifty‑nine percent, while temperature fluctuates between ten and twelve degrees Celsius, medianing near eleven degrees.

Because the data set contains only two stations, spatial variation within Riehen cannot be captured in detail, and the older PM10 record means that recent trends for that pollutant are not reflected. Nonetheless, the fresh timestamps for the other five variables demonstrate that most of the current air‑quality picture is based on observations from just a few days ago, offering a timely snapshot of conditions at the two monitoring locations.

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 Riehen are based on five valid measurements and have been updated within 3 days, with the latest record logged at 2026‑02‑10T21:00:00+00:00. This snapshot reflects conditions at a specific time and place; air quality can vary across different locations and moments within the city, so values may differ from what you experience elsewhere or later in the day.

OpenAQ station rows