[Hygiene problems in spas]

The problems of hygiene to be tackled in spas are governed by Federal German legislation such as the Federal Communicable Diseases Act, the Federal German DIN standard regulation No. 19643, the guidelines for the construction of medical baths and the legal definition of a spa. The article describes the problems of hygiene encountered in respect of the water in swimming pools and in physical exercise basins in spas, as well as the problems of hygiene in other fields with particular reference to microorganisms that are of special importance as far as hygienic aspects are concerned. Reference is made to the trihalogen methanes and to the problems in connection with the employed materials.