Regulation 11 - Direct Potable Reuse

Someone filling up water glass

The state of Colorado expects to double its population by the year 2050, adding to demands on the state’s most precious resource (water). The state Colorado Water Plan lays out strategies to address projected gaps in water supply and demand, and direct potable reuse (DPR) is one of those strategies. DPR involves an extensive public outreach process and the installation of advanced water purification steps to ensure that wastewater can be safely reused for drinking water. There are no system-wide or regularly used DPR systems in Colorado currently, but some utilities have pilot projects to showcase DPR's ability to address water needs for future generations. 

While DPR is not prohibited in the state, there are no federal or state regulations for DPR. Setting minimum requirements and oversight for DPR ensures consistency and helps ensure thorough public outreach. Regulated entities have requested that the division begin developing a DPR-specific rule through an engagement process. The addition of a DPR rule will allow water systems across the state to partner with CDPHE to properly plan and communicate with their public about what is needed to safely accomplish DPR. Stakeholders have been active in helping to develop the appropriate background for a Colorado DPR Rule. They have supported the development of a key guidelines document authored by the National Water Research Institute and an independent panel of national experts (December 2019).

The department is requesting feedback on a draft DPR rule within the Colorado Primary Drinking Water Regulations (Regulation 11). Use the links below to get involved and find out more about this proposed regulation.

Engagement timeline

Click on the timeline image below to enlarge. 

How to get involved

Engagement overview

The proposed schedule for the outreach and rulemaking process is as follows:

  1. Host a virtual kick-off stakeholder meeting to inform the regulated community and gather additional feedback.
  2. Form several working groups to help develop specific portions of the proposed rule. If you have signed up for a working group and you do not receive an email regarding meeting schedules by April 28, 2021, contact Tyson Ingels at
  3. The department anticipates the outreach process will last through 2021 and the rule-making process will be complete by 2023.

Meeting information

The department held the final virtual stakeholder meeting on Feb. 23, 2022. During this meeting, staff reviewed comments received on the draft regulation package, and presented the draft statement of basis and purpose. To access meeting materials (including meeting recordings, chats, and presentations) visit the Google drive public folder.


Other resources:

Fact Sheet - Regulation/Division Policy/Guidance

Considering the Implementation of Direct Potable Reuse in Colorado (White Papar) - Water Environment Research Foundation

Advancing Direct Potable Reuse to Optimize Water Supplies and Meet Future Demands - Water Reuse Colorado & Carollo Engineers

WaterReuse Colorado Direct Potable Reuse Project - Pure Water Colorado

Guidelines for Direct Potable Reuse in Colorado - National Water Research Institute

Hazard Analysis and Critical Control Points video presentation and PDF


Do you have questions about this rulemaking effort? Contact Tyson Ingels by phone at 303-692-3002, or by email at

Do you have feedback about this website and the engagement process? Email