2025 Urban Water Management Plan & Water Shortage Contingency Plan Public Hearing May 12, 2026
Why is this needed?
Urban Water Management Planning Act
(AB 797 enacted in 1983, Water Code Sections 10610-10657) Water providers Serving more than 3,000 customers or
supply 3,000 acre-feet per year
Evaluates water supply and demand over a 25 year period Required to be updated every 5 years
Required for City to remain eligible for State grants and loans
UWMP Timeline
Deadline
Requirement
July 30, 2025
Authorized Agreement with West Yost for UWMP
August 26, 2025
60-Day notices to SSJID and other stakeholders
January 2026
State Released UWMP Guidlines
April 20 & 27, 2026
Notices of Draft UWMP and Public Hearing to San Joaquin County and Public May 12, 2026
City Council Meeting: Public Hearing to receive Public comments May 12, 2026
City Council Meeting: Consider Plan Adoption
By July 1, 2026
Submittal to Department of Water Resources
UWMP Outline
Chapter 1 – Introductions
Chapter 2 – Plan Preparation
Chapter 3 – Service Area Description
Chapter 4 – Water Use Projections
Chapter 5 – 2020 Conservation Target Compliance
Chapter 6 & 7 – Water Supply Availability and Reliability Chapter 8 – Water Shortage Contingency Plan
Chapter 9 – Demand Management Measures
Chapter 10 – Plan Adoption and Implementation
Water Service Area
Treated surface water purchased from the South San Joaquin Irrigation District Groundwater from the Eastern San Joaquin Subbasin
Potable water system consists of
16 active potable groundwater wells
3.8 million gallons of storage
Over 350 miles of pipelines
Acheived 2020 Conservation Target
Enacted in 2009
Requires 20% reduction in per capita water use
2010 Manteca’s per capita water use was 223 gallons per person per day.
Potable Water Demand
Buildout anticipated by 2045
Demands based on future land use from the City’s General Plan
Manteca’ Water is Reliable
Projected supply and demands analyzed for normal, single-dry year, and five-consecutive dry years Drought risk assessment for 2026 to 2030
City’s water supply expected to meet projected water demands through 2050 SSJID has plans for expansion of the Nick C. DeGroot WTP City will continue to monitor groundwater wells and manage groundwater sustainably City will continue to produce recycled water to meet existing demands
Water Shortage Contingency Plan
Conforms to:
State’s standard water shortage stages
Requirement for Annual Water Supply and Demand Assessment 6 shortage levels, up to 50% water shortage
Example of actions for each level:
Level 1: Expand public information, prohibit washing hard surfaces, require automatic shut off hoses Level 2: Limit landscape irrigation to specific days, restrict water use for decorative water features Level 3: Landscape expansion restrictions, prohibit vehicle washing Level 4: Prohibit certain types of landscape irrigation, no new water connections, prohibit filling pools Level 5: No new connections
Level 6: Increase water use compliance actions
THANK YOU!