Understanding Cross Connection
A cross connection is any actual or potential physical link between a public water supply—or a customer's plumbing—and a source of non‑potable water (liquid, solid, or gas) that could enter and contaminate the safe drinking water through backflow. To protect public health, Cross Connection Control requires installing certified backflow prevention devices wherever such a connection exists.
What Is the Cross Connection Control Program?
Under WAC 246‑290‑490, public water purveyors like Covington Water District must:
- Develop and implement a comprehensive cross-connection control program.
- Eliminate or control all actual or potential cross connections with lawful authority, including local code enforcement.
Covington's program requires:
- Registering every backflow prevention assembly installed at potential cross connections.
- Annual testing by a certified Backflow Assembly Tester (BAT) to ensure proper operation.
This protects the public water supply and keeps systems compliant with state regulations.
Types of Backflow Prevention Assemblies
Depending on the hazard level and presence of interconnections, different assemblies are required:
- Auxiliary Water Systems
- If there's no connection to the District’s system, install Double Check Valve Assemblies (DCVAs).
- If an actual interconnection exists, use Reduced Pressure Backflow Assemblies (RPBAs).
- Fire Sprinklers & Irrigation Systems
These typically require approved backflow prevention per District policies (specifics per system size and design). - Air Gaps
In high-risk scenarios, a physical air gap may be required instead of mechanical devices.
Utilities must evaluate each premise to determine suitable devices based on hazard assessment.
Annual Testing & Compliance
To remain in good standing:
- All backflow devices must pass annual testing by a Washington-certified BAT.
- Test reports must be submitted by July 31st each year (testing window: Jan 1–July 31).
- Failure or missed testing may result in fines or service termination.
Purveyor and Customer Responsibilities
Purveyor (Covington Water District) | Customer / Property Owner |
Develops & enforces the CCC program | Installs required backflow assemblies |
Registers and maintains inventory of devices | Ensures annual testing and timely repairs |
Follows WAC 246‑290‑490 and local codes | Provides access for inspections & submits test reports |
Why It Matters
- Human Health Protection: Prevents contamination by backflow of hazardous or non-potable substances.
- Regulatory Compliance: Aligns with Safe Drinking Water Act, state WACs, and District policies.
- Service Reliability: Maintains water quality consistency and safeguards the infrastructure.
Need Help? Contact Us!
The District thanks you for supporting this public health initiative. For questions or assistance, contact the Cross Connection Specialist at (253) 631-0565 or customer.service@covingtonwater.com