Customer Care & Operations
Cross-Connection
Cross-Connection Control Program
The DC Water Cross-Connection Control Program is responsible for inspection, regulation, enforcement and education in preventing backflow incidents in the District. A cross connection is a physical connection between the drinking water system and a non-potable source. Backflow occurs when an unprotected cross-connection allows the reverse flow of a non-potable substance into the water system, potentially contaminating or polluting the drinking water supply. The Cross Connection Control Program ensures proper backflow protection methods are used at cross-connections in the District to prevent contamination and protect public health.
For additional information about the Cross-Connection Control Program, contact the Drinking Water Division at 202-612-3440 or email crossconnection@dcwater.com. Learn more about ensuring water quality in commercial buildings.
What can you find in this section?
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Backflow Prevention Assemblies
Examples of backflow prevention assemblies -
Certified Inspectors
List of contractors certified to inspect, maintain and test backflow prevention assemblies -
DC Water Cross-Connection Control Policy Manual
Cross-Connection Control Program policies and procedures -
District of Columbia Cross-Connection Ordinance
Ordinance providing authority for inspection and enforcement of cross-connections in the District of Columbia -
Frequently Asked Questions
Common questions about cross-connection control, backflow prevention assemblies and devices - Official Test Forms
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