Water Division

Utilities Department BuildingThe Water Division of the Utilities Department is responsible for the operation, maintenance, and improvement of the municipal drinking water system serving 88,000 people in the City of Napa and adjacent areas. The Water Division is dedicated to providing a safe and reliable supply of high-quality drinking water for its residential, commercial, industrial, and institutional customers. A comprehensive review of the City's water system is contained in the Urban Water Management Plan. The Plan describes and evaluates water supply sources, projected demand, water conservation, and overall water service reliability through 2035.

Current News:

  • Annual Hydrant Flushing Program runs from January through April 2020. Check the program's web page for maps of current flushing locations.
  • City of Napa Water has moved! We have joined the rest of the Utilities Department in our new office at 1700 Second Street, Suite 100 (intersection of Second & Seminary Streets).
  • Will PG&E planned power outages affect my water service?
  • Our 2018 Drinking Water Quality Report is available online. Learn about your tap water and the strict Federal and State health standards it meets. Paper copies will be mailed only upon request by calling 707-257-9521.  Copies may also be picked up at the Water Division, 1340 Clay Street, and at City Hall, 955 School Street.
  • Aging Pressure Regulators (PDF) at older homes in Browns Valley may fail and cause sudden high pressure spikes that can damage indoor appliances. Customers are encouraged to replace failed regulators, and call 707-257-9521 with any service concerns
  • Our Urban Water Management Plan (UWMP) 2015 Update was adopted by City Council and has been approved by the California Department of Water Resources (DWR).  View the DWR Review Letter (PDF).
  • Drought may be over, but Water Waste Prohibitions remain in effect.