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An independent, UK based, non-commercial organisation, operating since 1984 and dedicated solely to raising standards in swimming pool water treatment. This is achieved through public statements, reports, books and professional advice - all backed by practical research and the experience of its members and advisers. These are drawn from professional institutions, national and local government, health authorities and trade associations. The organisation is funded through the sale of its own influential publication Swimming Pool Water and from the subscriptions of its members.