An average swimmer swallows an average of 50 milliliters of water while bathing, a non-swimmer 30 milliliters. Children playing around often swallow many times this amount.

Clean bathing water is a prerequisite for swimming and bathing to be healthy.

However, as bathing water is also a good carrier of microorganisms and every bather releases several million bacteria, viruses, fungi and other microorganisms into the bathing water, the bathing water in public indoor and outdoor pools must be treated in such a way that the risk of infection is kept as low as possible. Proper chlorination of the bathing water ensures that the microorganisms introduced by all bathers are rendered harmless so quickly that there is no risk of disease transmission.
Technical treatment of the bathing water is therefore important.

The public health department monitors all official bathing waters, public outdoor and indoor swimming pools, teaching pools and hotel and spa pools in the area of the city of Salzgitter.

The health department is responsible for monitoring swimming pools and bathing pools, including their respective water treatment systems.

During monitoring, water samples are taken during pool operation and tested on site for compliance with certain values (e.g. pH value and chlorine content). In addition, a sample is taken for microbiological testing.
The basis for the monitoring of swimming and bathing pool water is the Infection Protection Act and DIN 19643 (technical regulations).

Swimming and bathing pool water must be treated in such a way that human health is not harmed, in particular by pathogens. The treatment of swimming and bathing pool water must be carried out in such a way that these requirements of the Infection Protection Act are met at all times in all pool areas. These requirements must be ensured by the operator as part of the general duty to ensure public safety and are monitored by the public health department.