Sterling Ranch leads Colorado's first rainwater harvesting pilot program

Sterling Ranch in Douglas County has become the first community to apply for a state pilot program on rainwater harvesting. The development is already known for its efficient irrigation systems and native, drought-resistant landscapes. Now, it aims to expand its water-saving efforts even further. Colorado has approved up to 10 pilot programs for large-scale rainwater harvesting. Sterling Ranch is preparing to use captured rainwater for irrigating parks and shared green spaces across the neighbourhood.

Dominion Water and Sanitation has requested permission to collect around 111 acre-feet of water each year for the project. Meanwhile, researchers are closely studying the potential of rainwater reuse. Sybil Sharvelle, a professor at Colorado State University, is testing rainwater collection from the Hydro Building’s roof to water native plants without using drinking water.

Aditi Bhaskar, a professor at the University of Colorado, has been analysing runoff from Sterling Ranch. Her work focuses on how a mostly xeriscaped community affects water flow for users downstream. Sharvelle is also exploring broader questions, such as how much water can be conserved through harvesting and how to address issues like contamination and legal rights to downstream water. The pilot program could set an example for other communities looking to maximise water efficiency. Sterling Ranch’s existing design and ongoing research may help shape future water-saving strategies across Colorado. Sharvelle plans to continue her studies to support wider adoption of rainwater harvesting.