Know Your Water

Sitting in the high-plains at an average elevation of 6,200 feet - with only an average of 8 to 15 inches of precipitation a year - water has always been a consideration for Castle Rock. Located in the arid Southwest, the Town is not located near a major water source.

We currently get most of our water from underground aquifers, a non-renewable resource, and we are slowly depleting this resource as aquifers take hundreds of years to recharge.

The Town is currently acquiring renewable water from Plum Creek; working on projects to begin importing it from northern sources; and storing it in Rueter-Hess Reservoir; and participating in a project that will allow the Town to capture renewable supplies in Chatfield Reservoir to ensure our residents have water for the future.  

Conservation and water-use management is an integral part of the Town’s strategic plan. The Town created its first comprehensive Water Conservation Master Plan in 2006. After one year of implementation, per person usage dropped by 20 percent to 137 gallons per capita daily (GCPD). In 2016, our 5-year average consumption went down to 117 GCPD - which is significantly below the Colorado Water Plan’s goal of 129 GCPD. Castle Rock's current goal is to reach an additional 17 percent reduction by 2050.

Photo courtesy of Ray Waterman
A primary reason for making conservation a priority is economic. Conserving water in Castle Rock will save us from having to purchase more renewable supplies in the future. Since 2007, each Castle Rock household has used 27 percent less water. If we maintain this volume of reduced water use into the future, a potential savings of $59 million renewable water acquisitions could be realized by 2050.

(Note: The 27 percent decrease is not solely attributed to conservation. Other factors including lower temperatures, resulting in less summer irrigation, affect this calculation. We use a 5-year average for GCPD to minimize fluctuations.)