How clean is the air we breathe?
The air we inhale every day contains various substances – some of them harmful to health and the environment. The German Environment Agency (UBA) continuously monitors air quality across the country and provides up-to-date and reliable data in a transparent way.
Whether you're a concerned citizen or a scientific researcher: UBA's air quality data is a valuable resource for everyday decisions, academic work, and policymaking.
Air Quality Index (AQI): Understand air pollution at a glance
UBA’s Air Quality Index (AQI) summarizes pollution levels from major pollutants like particulate matter (PM10, PM2.5), nitrogen dioxide (NO2), and ozone (O3). It ranges from "very good" to "very poor" – color-coded and easy to interpret.
Learn more about AQI calculation
Live Measurements – Nationwide coverage
Over 400 monitoring stations collect continuous air quality data across Germany. Values are available hourly, daily, and annually – freely accessible and regularly updated.
API Access for Developers and Researchers
For those working with data, UBA provides a RESTful API that allows automated access to air quality measurements. It’s ideal for integrating data into custom applications, research workflows, visualizations, or mobile apps.
API v2 documentation, API v3 documentation, API v4 documentation
Air Quality by Federal State
Curious about the air quality in your region? Explore current air monitoring data for each German federal state:
- Baden-Württemberg
- Bavaria
- Berlin
- Brandenburg
- Bremen
- Hamburg
- Hesse
- Mecklenburg-Western Pomerania
- Lower Saxony
- North Rhine-Westphalia
- Rhineland-Palatinate
- Saarland
- Saxony
- Saxony-Anhalt
- Schleswig-Holstein
- Thuringia
All links end on a page in German.