Water Supply Master Plan | Santa Clara Valley Water

A reliable supply of clean water is necessary for the social, economic, and environmental well-being of Santa Clara County. The Water Supply Master Plan (WSMP) is Valley Water’s guiding document for long-term water supply investments to ensure water supply reliability for the County. Updated about every five years, this long-range plan assesses future county-wide demands and evaluates and recommends water supply and infrastructure projects to meet those demands to achieve Valley Water’s level of service (LOS) goal through the planning horizon. Valley Water’s LOS goal is to “Meet 100 percent of annual water demand during non-drought years and at least 80 percent demand in drought years.”

Water Supply Master Plan 2050

The most recent plan, Water Supply Master Plan 2050, was adopted by the Valley Water Board of Directors (Board) in November 2025. The WSMP 2050 addresses both existing and emerging challenges and identifies strategies to maintain the reliable water supply system for Santa Clara County through 2050. The cornerstone of the WSMP 2050 is an adaptive management framework to support investment decisions in the face of uncertainties associated with future conditions and project development.

Water Supply Master Plan 2050

The archived meeting packets and recordings for past WSMP 2050 Board updates can be found here:

The previous plan, Water Supply Master Plan 2040, and its annual reports can be found here.

For any questions or inquiries about the WSMP 2050, please contact [email protected]