If the technical action value for legionella or other contaminants in the water supply systems is exceeded, special notification and action obligationsapply in accordance with the Drinking Water Ordinance. The operator must report all limit value exceedances to the public health department.
Water supply companies are responsible for supplying or providing consumers with safe drinking water.
Drinking water must not contain any pathogens or harmful substances in dangerous quantities.
Note: Drinking water can also be contaminated within the building water supply system. In this case, the homeowner or landlord is responsible for compliance with the quality requirements for drinking water.
This also applies to any necessary renovation of the pipes.
Changes in the taste, smell or color of the water can be indications of contamination.
If you have the impression that your drinking water may be contaminated, you should report it.
The water supply company or the operator of the building's water supply system must investigate the problem, for example by carrying out their own tests.
In the case of justified complaints, the local health authority can also have an official drinking water test carried out.
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You have questions? Call us: from any network, without an area code. Authorities number 115: Monday to Friday, 8 a.m. to 6 p.m. You can usually reach the authorities number 115 at fixed network tariffs and thus free of charge via flat rates. Sign language telephone: Monday to Friday, 8 a.m. to 6 p.m.