Backflow Prevention and Cross-Connection Control

back flow

Backflow Prevention and Cross-Connection Control Rule Updates to Coincide with Lead and Copper Rulemaking Process

Cross-connections remain the largest culprit in waterborne disease outbreaks in the United States. The division began a stakeholder engagement process in November 2022 to update the Backflow Prevention and Cross-Connection Control Rule (BPCCC Rule) in Regulation 11, Section 11.39.

The division would like to thank stakeholders for the thoughtful feedback provided about the proposed updates to the BPCCC Rule. The most recent proposed draft and comments received by stakeholders can be viewed in the meeting materials folderThe proposed improvements will protect public health while assisting water systems with the implementation of the requirements of the rule.

The final draft of the updated rule and division responses to comments received by stakeholders can be viewed using the buttons below. 

The division will continue this stakeholder effort and update Policy 7 related to the BPCCC Rule. A kick-off meeting is planned for later this spring and you can sign up for email notifications to stay informed. The goal is to update Policy 7 in anticipation of the Water Quality Control Commission taking action to improve Regulation 11.39 so that the policy is ready when the new rule becomes effective.

For questions related to Regulation 11 Backflow Prevention and Cross-Connection Control, contact Tyson Ingels by phone at 303-692-3002 or by email at