The Water Division is responsible for the operation, maintenance, and improvement of the municipal water system serving more than 86,000 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 water shortage contingency programs, and overall water service reliability through 2035.

HYDRANT FLUSHING:  Annual Hydrant Flushing Program runs from December 8, 2016 through April or May 2017. Visit the program's web page for current maps of areas being flushed. The water used is not waste. It is part of an essential, planned maintenance activity to improve our water quality. Find answers to Frequently Asked Questions.


sow logo smallThe Governor first declared a Drought State of Emergency in January 2014, encouraging all Californians to take personal actions to reduce water demand.  In 2015, with record low snowpack in the Sierra Nevada mountains, the Governor issued additional Executive Orders mandating statewide reductions in urban water use.  Under the adopted regulations, the City of Napa was required to reduce its total water consumption by 20% for the period of June 2015 through May 2016 (compared to 2013 levels).  Together, we beat the target, saving 1.2 billion gallons!  With the drought now eased in Northern California, the State Water Board has allowed urban water suppliers to establish conservation standards based on their own local circumstances.  As a result of our local Water Supply Reliability Certificationthe City is not subject to a percentage savings mandate.  As we transition back to our long-term water efficiency goals, please visit our Water Conservation section for local water-saving ideas, including generous rebate programs, and get some great tips from the Save Our Water campaign.  Keep in mind that the State Water Board has retained statewide regulations to prohibit water waste and the City is enforcing for all customers:


REPORT WATER WASTE:  Call 707-257-9521 or This email address is being protected from spambots. You need JavaScript enabled to view it.




Click the following links for details on specific Water Division topics: 

Contact Water Division administrative staff at 707-257-9521.  Our downtown Napa headquarters is located at 1340 Clay Street (Clay & Franklin Streets), and is open weekdays 8am to 5pm.  For after-hours water emergencies, please call 707-253-4451.