The Pool & Hot Tub Alliance will begin reviewing and revising ANSI/APSP/ICC-11 2019 American National Standard for Water Quality in Public Pools and Spas.

It is calling for change request submissions from stakeholders, including manufacturers, builders, designers, retailers, U.S. public health and code officials, local municipalities, pool/spa operators, and service companies.

The revised standard, to be called PHTA-11, will provide water-quality parameters for public pools, spas, and hot tubs, including a range of values relating to chemicals.

Proposals will be accepted through May 31. Go to