PWTAG Technical notes are updates or new material for the standards and guidance given in the PWTG book, Swimming Pool Water and the PWTAG Code of practice and should be read in association with these publications.
Pollution and hygiene
Pollution is introduced almost continuously into the water of swimming pools and spas. Even the mains water that supplies them may contain substances that affect pool water quality. The main source of pollution is the bathers themselves.
Whatever the source of pollution, it should be dealt with by appropriate water treatment, including disinfection and the other process.
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