Urban Water Management Plan

2020 Update

As an urban water supplier, the City of Napa is required to submit an update of its Urban Water Management Plan (UWMP) to the State Department of Water Resources (DWR) every five years. On December 21, 2021, the City Council will conduct a public hearing for the adoption of three documents:

The 2015 UWMP is being amended to meet requirements of the Sacramento-San Joaquin Delta Reform Act of 2009. The 2020 plan is a new summary of City water supplies, demands, and conservation, and overall water service reliability through 2045. The Water Shortage Contingency Plan is a stand-alone document that guides the City through supply shortfalls up to 50% or more.

Beginning Tuesday, December 7, printed copies are available for review at the following Napa locations:

  • Utilities Department, 1700 Second Street, Suite 100
  • City Clerk, City Hall, 955 School Street
  • Napa City-County Library, 580 Coombs Street

2015 Update

UWMP 2015 Opens in new windowOn September 5, 2017, the City Council conducted a public hearing and adopted, by Resolution R2017-116 (PDF), the City of Napa's Urban Water Management Plan (UWMP) 2015 Update. It was reviewed by the California Department of Water Resources (DWR) and found to have addressed California Water Code requirements. View the June 21, 2018 DWR Review Letter (PDF). As an urban water supplier serving more than 3,000 connections or 3,000 acre-feet annually, the City is required to submit an updated UWMP to DWR every five years. The plan is a summary of City policies and procedures addressing water supply, demand, and conservation over the next 20 years. The 2015 Update demonstrates the City's interim 2015 compliance with the Water Conservation Act of 2009 (SBx7-7) which seeks a statewide 20% reduction in urban per capita water use by 2020. Supply and demand comparisons show excellent overall water service reliability, with no shortfalls projected through 2035 even in critical single-dry years.

The Urban Water Management Plan 2015 Update (PDF) and its accompanying Errata Sheet (PDF) are available for public review.

2010 Update

UWMP 2010On June 21, 2011, the City Council conducted a public hearing and adopted, by Resolution R2011 95 (PDF), the City of Napa UWMP 2010 Update. It was reviewed by the California DWR and deemed complete on November 10, 2011. View the DWR Review Letter (PDF). The 2010 Update (Chapter 5) included the City's compliance strategy for the Water Conservation Act of 2009 (SBx7-7) which seeks a statewide 20% reduction in urban per capita water use by 2020.

View the UWMP 2010 Update (PDF) for complete details.


NOTE: The prior UWMP 2005 Update had relied primarily on data gathered from the 2050 Napa Valley Water Resources Study. An update of that countywide planning study is currently being discussed, as many of its supply and demand assumptions are out of date.