About Our Water
The City of Pleasanton operates and maintains a comprehensive water distribution system that delivers water to homes, businesses, and critical services like firefighting. The City distributes approximately 14,000 acre-feet of safe, reliable drinking water annually to over 22,000 customers. The City’s distribution system consists of 19 storage tanks, 14 pump stations, and over 300 miles of primarily underground piping. The annual operating budget for Pleasanton Water is currently approximately $29 million, with a five-year Capital Improvement Program of $76 million.
While the City historically relied on a mix of imported and the City’s local groundwater supplies, Pleasanton currently receives 100% of its water from Zone 7 Water Agency, Alameda County’s Tri-Valley water wholesaler.
Zone 7 secures and imports water from the State Water Project for the region, manages the local groundwater basin, and treats water at its two water treatment plants before selling it to the City of Pleasanton and other Tri-Valley water retailers for distribution. Although Pleasanton previously used its own local groundwater wells to supplement Zone 7’s water supply, the wells were decommissioned due to the detection of per- and polyfluoroalkyl substances (PFAS) and are no longer in use.
To strengthen long-term water reliability, the City and Zone 7 are evaluating the feasibility of constructing and operating a new joint groundwater supply project to provide Pleasanton with a new local, reliable water source.
The City is also part of Tri-Valley Water Partners, a collaborative effort between the region’s water wholesaler, Zone 7 Water Agency, and local water retailers to address the region’s collective water needs now and for future generations. Together, these partners promote water conservation as a permanent way of life, offering a range of programs and incentives to help residents and businesses use water efficiently and responsibly.
Where Our Water Comes From
Pleasanton’s water supply is sourced from a combination of imported surface water and local groundwater:
- Imported Treated Water: Provided by the Zone 7 Water Agency, which delivers treated surface water from the State Water Project and other regional sources.
- Groundwater Wells: Operated by Zone 7, these local wells supplement the City’s water needs, especially during dry periods.
Historically, approximately 20 to 25% of Pleasanton’s water was provided by local groundwater wells. However, in 2022, the City took these wells offline after detecting per and polyfluoroalkyl (PFAS) substances. Since then, the City and Zone 7 have been collaborating on regional groundwater supplies and joint planning efforts for a resilient and redundant water supply. Learn more about the Joint Groundwater Wells Study and Project.
Find out more about the state water project and the journey of water to our taps from the Tri-Valley Water Partners. Watch this video to learn more about our Water’s Journey.
Maintaining Our Water System
The City’s Public Works Department maintains the water distribution and sewer systems. To do so, the City has 27 employees who maintain, repair, and monitor our systems. Ongoing maintenance of our water system includes:
- Regular Monitoring of the System
- Water Quality Testing
- Water Meter Repair
- Backflow Inspection & Maintenance
- Fire Hydrant, Testing & Maintenance
- Water Main and Service Line Repairs
- Water Pump Station Maintenance
- Emergency Response 24 Hours a Day, 7 Days a Week
Reporting a Water Issue
If you identify a problem or hazard, such as a water leak, broken water line, or sewer issue, please file a report using the Public Works Department’s Maintstar portal. This portal is a specialized work request website accessible to customers who have a smartphone or computer.
Upon submitting your concern, residents will receive an automated email notification about the status of their request and can view requests on a map included in the application.
For Emergency Repairs, please contact us at the following depending on the day and time:
- Monday-Friday, 7 a.m. to 4 p.m.: (925) 931-5500
- After Hours and Weekends Call Police Dispatch: (925) 931-5100
Additional Resources
FAQs
How do we know that water coming out of the tap is safe to drink?
The City continuously monitors the safety of its drinking water and shares that information in its annual water quality report. This report summarizes the data collected from hundreds of laboratory samples taken every year.