What are the requirements for filtration, disinfection, and corrosion control?
A. Filtration. We must filter water in all public water supply systems that use surface water or ground water under the influence of surface water unless we meet the criteria listed in 40 CFR 141.71. Ask your Regional Environmental Compliance Coordinator for assistance to determine if your facility needs to perform filtration. B. Disinfection. We must disinfect water in all public water supply systems that use surface water or ground water under the influence of surface water. The system operator must disinfect the water in all other ground water systems unless we meet the criteria listed in 40 CFR 141.72. Ask your Regional Environmental Compliance Coordinator for assistance to determine if your facility needs to perform disinfection. C. Corrosion control. We must monitor all public water supply systems for lead and copper tap levels and other water quality parameters specified in 40 CFR 141.80 through 141.82 based on the size of the system. If the system exceeds MCLs, the system opera
