The Water Division is responsible for the operation, maintenance, and improvement of the municipal water system serving more than 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. 

HYDRANT FLUSHING:  Annual Hydrant Flushing Program runs from December 11, 2017 through April 2018.  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 by removing particles and minerals that have built up in the mains.  Find answers to Frequently Asked Questions.         

Click these links for 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.




Drought is over, but Waste Prohibitions remain in place:

sow logo smallWith Executive Order B-40-17 on April 7, 2017, the Governor officially terminated the Drought State of Emergency first declared in January 2014, but water waste prohibitions remain in effect.  Napa has been practicing conservation and becoming more efficient in its water use over the past two decades.  Thanks to this longstanding conservation and our reliable water supplies, State-mandated water use reductions had not been required for the City since May 2016, and are now removed for all of California.

It is prudent to be efficient and use our precious water resources wisely; however, the 25% decrease in demand during the recent drought resulted in reduced revenue available to operate, maintain, and invest in our water system.  Although water rates have historically been based primarily on the volume consumed, which is variable, most system costs are fixed, such as maintaining the extensive infrastructure necessary to treat and deliver water to customers.  The new water rates recently adopted by City Council address this imbalance.

As we transition back to our long-term water efficiency goals and address the State's new plan for Making Water Conservation a California Way of Life, 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.  Again, please note that although this most recent drought is behind us, the State Water Board is proposing permanent 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.