Castle Rock Water expands purification facility for advanced water reuse strategies

Douglas County is taking significant steps to enhance its water supply management, as discussed in the recent Douglas County Water Commission meeting on May 19, 2025. A key focus of the meeting was the ongoing efforts to utilize renewable water supplies more effectively, particularly through aquifer storage and water reuse initiatives.

The Commission highlighted the successful implementation of renewable water supply back into the aquifer, with several wells currently operational and more planned for the near future. This initiative is part of a broader regional collaboration with the Southwest Metro Water Supply Authority, aimed at optimizing local water resources. The Commission emphasized the importance of maximizing the use of water rights owned locally, including those from Plum Creek, Cherry Creek, and the South Platte River.

A major project discussed was the expansion of the Plum Creek Water Purification Facility, which is set to double its capacity from 6 million gallons per day to 12 million gallons per day at a cost of approximately $75 million. This facility is crucial for treating reusable water supplies and will eventually connect to the Chatfield Reservoir, allowing for more efficient water management. The expansion is designed to accommodate advanced purification processes, potentially enabling direct potable reuse in the future, although this remains a long-term goal due to regulatory and cost considerations.

The Commission also addressed the importance of water reuse, aiming for it to constitute about one-third of the county's water supply. This approach not only conserves water but also ensures that the community can rely on local resources without needing to source water from distant areas. The discussion included the challenges of compliance with new regulations regarding contaminants, which have financial implications for water treatment processes.

In conclusion, Douglas County's proactive measures in water management reflect a commitment to sustainability and resource efficiency. The ongoing projects and collaborations are expected to significantly enhance the county's water supply resilience, particularly in the face of potential drought conditions. As these initiatives progress, the community can look forward to a more secure and sustainable water future.