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 WaterPublic Water SystemsRules, Regulated Contaminants, & Policies
Cross Connections

Cross Connections

Cross-connections are defined as actual or potential connections between a potable water supply and a non-potable source, where it is possible for a contaminant to enter the drinking water supply. Cross connections make it possible for potentially hazardous, unsafe substances to enter a drinking water supply.

Cross Connection Rules (doc)

Protecting Your Water System: Cross Connections & Backflow Prevention (PDF)

Backflow Preventer Testers

American Society of Sanitary Engineering (ASSE) (external link)

Testers Certified by the American Backflow Prevention Association (ABPA) (external pdf)

Testers Certified by New England Water Works Association (NEWWA) (external link)

Additional Resources