Recycled Water
Planning for a More Reliable, Sustainable Water Supply
Diablo Water District is committed to providing a high-quality, reliable drinking water supply to our customers. As California's water resources face growing challenges, the District is exploring alternative water sources to strengthen long-term water reliability.
Several factors can impact the reliability of our water supply, including recurring drought conditions, the vulnerability of the Delta's water conveyance system to flooding and seismic activity, and regulatory limitations on surface water and groundwater pumping.
Utilizing recycled water for landscape irrigation can reduce demand on drinking water supplies and supports our commitment to a sustainable water future while helping manage long-term water costs for our customers.
What Is Recycled Water?
Recycled water is wastewater that has been treated for beneficial reuse, including irrigating parks, landscaped areas, and other public spaces.
Recycled water is typically delivered through a separate system of purple pipes, which distinguishes it from drinking water pipelines. Using recycled water for future landscape irrigation needs will help preserve drinking water supplies while making beneficial use of a local water resource.
Our Recycled Water Journey
Expanding recycled water opportunities takes planning, partnerships, and investment. The District has been working with Ironhouse Sanitary District (ISD) to explore how recycled water could benefit Oakley and Bethel Island.
What's Next?
The District and ISD are moving forward with an updated feasibility study, including environmental review and preliminary design. ANTICIPATED STUDY COMPLETION: Early 2027
Future efforts may include developing educational demonstration sites, engaging the community, and identifying additional opportunities to expand recycled water use.
Although recycled water is not currently part of the District's water supply, these efforts represent an important step toward diversifying local water resources and preparing for future community needs.
Recycled Water Resources
ISD offers seasonal recycled water filling stations for landscape irrigation. Click here for more information.