Public Water Systems (PWS)
Public water systems (PWSs) are regulated by the Ohio EPA 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, more than 95 percent of community water systems meet all health-based standards. When a system doesn't meet a standard, consumers are notified.