NACWA Supports Improved Instructions for Swimming Pool Discharges

(October 9, 2019) – NACWA supported EPA’s proposed label language for zinc and zinc salts, which are used in swimming pools, hot tubs, and spas, in September 30 comments

Since these products can potentially interfere with the biological processes used to treat wastewater if discharged into sewers, or have adverse aquatic impacts if discharged into storm drains, NACWA agreed with EPA’s proposed instructions stating, “[b]efore draining a treated pool, spa, or hot tub, contact your local sanitary sewer and storm drain authorities and follow their discharge instructions.”

NACWA previously submitted similar comments on other chemicals used in swimming pools: lithium hypochloriteboric acid, and sodium, calcium, and potassium hypochlorite.  While wastewater and stormwater utilities may have the ability to work with public and commercial swimming pool operators, it is much more difficult to regulate discharges from the millions of residential pools in the US. 

NACWA has been working with the Bay Area Clean Water Agencies (BACWA) to advocate for appropriate labeling of pool chemicals as the first step in educating pool owners about proper drainage procedures.

NACWA members with concerns or comments about pesticide impacts on wastewater or stormwater utilities should contact Cynthia Finley, NACWA’s Director of Regulatory Affairs.