Drinking water

Our bodies are composed of anywhere from 50 to 70 percent water, depending on age. Constant water intake is key to our health, as our bodies lose water throughout the day and night. An adult should normally drink an average of two liters of water daily. read more


Biological quality classification of watercourses

Große grüne Seerosenblättern mit einigen weißen Blüten

Biological water quality classification (saprobic system) is the oldest existing water quality classification, and a map has been published every five years since 1975 until 2000 by the Working Group of the Federal States on Water Issues (LAWA), the Biological Water Quality Map of Germany. It uses biological indicators (macrozoobenthos = invertebrates dwelling on the riverbed) to describe the oxyg... read more

The Umweltbundesamt

For our environment