CPWA monitors and treats drinking water to meet state and federal standards. The majority of CPWA water is supplied from the Boyack Road Water Treatment Plant. For the most current and complete testing results, source-water information, and required consumer information, review the latest Annual Water Quality Report below.
Water Hardness
Finished water hardness is approximately 340 mg/L, or about 19.88 grains per gallon.
pH
Finished-water pH is approximately 6.9.
Treatment
Sodium HexaMetaPhosphate is added to help sequester calcium carbonate in the water.
Disinfection
CPWA uses sodium hypochlorite for disinfection, with residuals generally around 1.3 mg/L. Fluoride is approximately 0.10 mg/L.
Annual Water Quality Reports
Annual Water Quality Reports provide detailed testing results, source-water information, and required consumer confidence information.
View 2025 Annual Water Quality Report View Report Archive
Lead and Service-Line Information
For information about lead, CPWA’s service-line inventory, and the customer survey used to verify service-line material, visit the pages below.