nitrogen dioxide

Umwelt-Indikator

Indicator: Air quality in agglomerations

A graph shows how strongly, on average, urban background levels of three main air pollutants in German agglomerations exceeded World Health Organisation (WHO) recommendations between 2000 and 2020. The trend for the different pollutants varies. Between 2000 and 2020, the values for nitrogen dioxide were between 35.9 and -19.8 percent, for ozone between 71.0 and 57.3 percent and for particulate matter (PM2.5) between 77.3 and -1.0 percent.

The background level of one main air pollutant (ozone) in German agglomerations still exceeds World Health Organisation (WHO) guide line values.Close to sources, pollutant levels can even be significantly higher.The situation regarding nitrogen dioxide and particulate matter has greatly improved since 2000. In 2020, the mean value fell below the WHO recommendation for PM 2.5 for the first time.Ozo... read more

Air

Nitrogen dioxide

The main sources of the air pollutant nitrogen dioxide are combustion processes in the industrial and energy production sectors, and road transport. Nitrogen dioxide affects the respiratory mucous membrane and influences the respiratory function. read more

Air

Quick guide on how to use "Current air data" information pages

Experts at the monitoring stations of the German states and the German Environment Agency take multiple daily measurements to determine the air quality in Germany. Shortly after measurements are taken, you can go to our “Current air data” webpage to look up measured values, some forecast data, and data on past years. read more

The Umweltbundesamt

For our environment