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According to the provisions of the Infection Protection Act, drinking water must be of such a quality that its consumption or use is not likely to cause harm to human health, in particular through pathogens. The operator of the drinking water supply system is responsible for compliance with this requirement. They must monitor their drinking water by having samples taken by a specially approved laboratory. In addition, drinking water supply systems are officially monitored by the state health authorities.
The water management administration is responsible for groundwater protection and thus the protection of the drinking water resource.
Swimming or bathing pool water as well as swimming or bathing pond water in commercial enterprises, public baths and other facilities not used exclusively for private purposes must also be of such a quality in accordance with the provisions of the Infection Protection Act that there is no risk of harm to human health, in particular from pathogens, through its use. The operator of a swimming or bathing pool or a swimming or bathing pond is responsible for ensuring that the water quality meets the legal requirements. This is ensured in particular by taking samples. In addition, swimming pools and bathing pond facilities are officially monitored by the health authorities.
The operator of a water supply system, a swimming or bathing pool or a swimming or bathing pond must carry out the water tests incumbent upon him or have them carried out at his own expense. They must also bear the costs (fees and expenses) of the water tests that the public health department carries out or has carried out.
In Bavaria, 374 EU bathing sites were designated at around 290 lakes in 2024. The water quality at these EU bathing sites is subject to regular monitoring by the health authorities. Water samples are taken monthly during the bathing season (May 15 to September 15). An additional sample is taken shortly before the bathing season.
The operator must notify the public health department of the construction, commissioning, decommissioning, structural and operational changes or the transfer of ownership or right of use of the water supply system to another person.