Water Division

Water Division Building

The Water Division is responsible for the operation, maintenance, and improvement of the municipal drinking water system serving nearly 88,000 people in the City of Napa and adjacent areas. The 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 through April 2019. Check the program's web page for maps of current flushing locations.
  • Our 2017 Drinking Water Quality Report is available online. Learn about your drinking water and the stringent Federal and State health standards it meets. Paper copies will be mailed only upon request by calling 707-257-9521. Copies are also available to pick up at the Water Division, 1340 Clay Street, and at City Hall, 955 School Street.
  • Project is ongoing to replace the 100+ year-old pipeline beneath Third Street (between California and Seminary).  View the Third Street Neighborhood Announcement (PDF) for construction details.
  • 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.