PHTA Completes APSP-11 Revision; ANSI Public Review Now Open

(Alexandria, Va.) – The Pool & Hot Tub Alliance (PHTA), the trade association representing the swimming pool, hot tub, and spa industry, welcomes public review and comments on revisions to the ANSI/APSP/ICC-11 2019 American National Standard for Water Quality in Public Pools and Spas. Public review is a fundamental part of the American National Standards Institute (ANSI) standards consensus development process.

The PHTA/ICC-11 standard provides recommended minimum guidelines for the specifications for water quality parameters in the public swimming pool and spa industry. It covers a range of values relating to various chemicals that are acceptable for pool and spa operation, and for purposes of public health and safety.

The draft revision of the standard is now available during the 45-day public review. The public review draft can be found on the PHTA website and includes updates and revisions to the language used to standardize water quality in public swimming pools and spas. The PHTA-11 Standard Writing Committee also reorganized the order and placement of content, notably in Section 6 and Section 7, while keeping stated parameters the same. 

This standard applies to pool manufacturers, builders, designers, retailers, U.S. public health and code officials, local municipalities, pool and spa operators, and service companies, as well as consumers who use these types of pools and spas.

PHTA invites all pool, spa, and hot tub professionals, as well as non-industry members, to review the revisions and submit comments for consideration. The ANSI public review period for the PHTA-11 standard was published in the ANSI Standards Action newsletter on October 24, 2025. All public review comments are due by December 8, 2025.

For more information on the draft standard, please visit the PHTA-11 webpage, email standards@phta.org, or call (703) 838-0083. 

About the Pool & Hot Tub Alliance

The Pool & Hot Tub Alliance (PHTA), a non-profit organization with over 4,000 members from around the world, was established in 1956 to support, promote, and protect the common interests of the $62B pool, hot tub, and spa industry. PHTA provides education, advocacy, standards development, research, and market growth initiatives to increase our members’ professionalism, knowledge, and profitability. Additionally, PHTA promotes the use of pools by expanding swimming, water safety, and related research and outreach activities aimed at introducing more people to swimming, making swimming environments safer, and keeping pools open to serve communities. For more information, visit www.phta.org.