Division of Environmental and Community Health

Maine Center for Disease Control & Prevention

A Division of the Maine Department of Health and Human Services

DHHSMeCDCEnvironmental and Community HealthDrinking Water Compliance & EnforcementRules, Regulated Contaminants, & Policies
Groundwater Rule

Groundwater Rule


The intent of the Groundwater Rule (GWR) is to provide for increased protection against microbial pathogens in public water systems that use ground water sources. The GWR was written with particular concern about those ground water systems that are susceptible to fecal contamination since disease-causing pathogens may be found in fecal contamination.

The GWR applies to public water systems that serve ground water. The Rule also applies to any system that mixes surface and ground water if the ground water is added directly to the distribution system and provided to consumers without treatment.


The Groundwater Rule

Additional Resources

Updated 8/2/2023