Air quality in Lausanne, Vaud, Switzerland today

Mr. Duck’s Air Quality Score

Good air today for Lausanne, Vaud, 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 Lausanne, Vaud is classified as Good today. The primary pollutant identified is PM10, with a reported reference value of 3.1696 based on nine valid measurements from OpenAQ data.

These figures reflect the current monitoring snapshot 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 air‑quality record for Lausanne draws on ten recent observations collected at two monitoring sites. All four key pollutants—nitrogen dioxide (NO2), ozone (O3), fine particulate matter (PM10) and carbon monoxide (CO)—are represented, but the data are not evenly distributed across them. The three gases measured at the Plaines‑du‑Loup station were all refreshed on 2026‑02‑10 at 21:00 UTC, while CO comes from the César‑Roux site with its latest reading a hour earlier at 20:00 UTC on the same day. Because every entry falls into the “updated within 7 days” freshness bucket, the dataset reflects very recent conditions for each pollutant.

The values show modest variability. NO2 ranged from 9.23 to 28.84 µg/m³ with a median of about 12.76 µg/m³; O3 spanned 46.89‑64.93 µg/m³, centering near 61.46 µg/m³; PM10 was low, moving between 2.67 and 4.18 µg/m³ with a median of 3.17 µg/m³. CO, by contrast, is reported as a single constant figure of 293.5 µg/m³, indicating only one measurement point rather than a distribution. This uneven coverage means that while the ozone and nitrogen dioxide data give a sense of typical and extreme values, the particulate and carbon monoxide records provide less insight into variability across the city.

Overall, the dataset offers a snapshot of current air quality in Lausanne with fresh timestamps for all pollutants, but the limited number of stations and the single‑point CO reading highlight that conditions can differ by location and time. Users should keep in mind that these figures represent specific monitoring spots rather than a comprehensive citywide picture.

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 Lausanne includes nine valid measurements and is updated within three days, with the most recent data recorded on 10 February 2026 at 21:00 UTC. While this snapshot provides a current view of city‑wide air quality, conditions can differ across neighborhoods and change throughout the day, so local variations may not be fully captured in these figures.

OpenAQ station rows