Information on limit values of gases, particles and pollutants in the air we breathe.

Limit values are controversially discussed. For many they are too low, for others too high. However, it is important to know them and even understand the background - e.g. why much higher limit values are often permitted in the workplace than at home or outdoors. We have compiled this information on limit values for gases, particles and pollutants in the air we breathe for you here in an overview.

Where are legal limits for pollutants in the air - find out here. For your health and well-being!

Here you will get an overview of the often complex definition of the limit values of air pollutants such as particulates, nitrogen dioxide, VOC, formaldehyde or ozone, which are specified by the Federal Environment Agency or the WHO. A distinction is made between limit values for specific pollutants outdoors, indoors and at work. In fact, it is often difficult to keep track and find out when action is required. The air analyzer air-Q helps you by monitoring the limit values for you.

Limit values

Sulphur dioxide (SO2)
Federal Immission Control Act Limit value for 1h	350 µg/m³
Federal Immission Control Act Limit value for 24h	125 µg/m³
Federal Immission Control Act Alarm value	500 µg/m³
EU directive for 2030 for 1h	350 µg/m³
EU directive for 2030 for 24h	50 µg/m³
EU directive for 2030 for 1 year	20 µg/m³
WHO guideline for air quality for 24h	40 µg/m³
WHO guideline for air quality for 10min	500 µg/m³
Occupational exposure limit	2700 µg/m³

The Federal Environment Agency sets a daily limit value of 50 μg/m³ for particulate matter PM10, which may only be exceeded on 35 days a year. In general, a maximum annual average value of 40 μg/m³ applies. For the smaller PM2.5 particles, there are only non-binding target values of 25 μg/m³ from the EU and WHO. For even smaller particles - although much more dangerous - there are currently no limit values.

Can be measured with:

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