Public Water Systems

Public water systems (PWSs) are regulated by the Ohio Environmental Protection Agency, Division of Drinking and Ground Waters (Ohio EPA DDAGW).  Public water systems use either a ground water source, a surface water source, or a ground water under the direct influence of surface water source.  In Ohio, around 4,800 public water systems serve approximately 11 million people daily.  Public water systems are required to monitor their water regularly for contaminants.  Currently, over 95% of community water systems meet all health-based standards.  When a system doesn't meet a standard, consumers are notified.


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