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This standard is as a revision of ANSI/APSP-11 2009 and is based on the most recent health-related scientific information regarding recreational water quality. The objective of this voluntary standard is to provide recommended minimum guidelines for the specifications for water quality parameters in public pools and spas. It can be incorporated into national or regional health codes, and adopted by state and/or municipalities as a local code or ordinance. This is the downloadable PDF version. A hard copy print version is also available in the PHTA Store.