In Sheboygan, Wisconsin inthe Recreation Department reported that youngsters had attended an day swimming course where the boys were unhampered by bathing suits. For other uses, see Skinny dip disambiguation. Insand filtration was introduced which reduced the number of bacteria present, but the safest way was not to wear woollen suits, and this approach was endorsed by the American Public Health Association APHA. Conflicts have arisen in the United States on federally-designated beaches, which are nevertheless patrolled by local police, since there is no federal law against nudity in these areas, but there may well be local ones. In the United States, states, counties and municipalities may enact their own dress codes, and many have.
The dispute was finally settled in when mixed bathing was permitted with the proviso that both men and women should wear suitable swimming costumes.
Playful blonde girl swims naked in Olympic swimming pool
These areas were not policed, and around —75,  under pressure from the church ever stricter bylaws were passed but not enforced. Establishments sought to impose dress codes. All this was very much an English problem and one of attitude. Although chlorination was effective, it was difficult to manage the pH of the water, as chlorine could cause burning of the skin if wrongly administered. For example, the Bath Corporation official bathing dress code of prohibited men and women to swim nude either in the day or in the night. Moral pressures forced some town councils to establish zones for the women and men to bathe separately. The Administration of Health and Physical Recreation training manual stated, "Nude bathing for boys is practiced universally, in a few schools girls may swim nude and this is the most sanitary method.