Water Sources

Water Supply Update
A summary report for the District, provided by the General Manager periodically at Regular Board Meetings. Past reports may be found in the meeting packets.

The District's Diversified Portfolio of Water Sources is listed below. This variety of sources is managed to supply water to the unincorporated communities of Montecito and Summerland through approximately 4,600 service connections, serving an estimated population of approximately 12,010. Annual consumption is currently approximately 4,000 Acre Feet per Year (AFY) and must remain in compliance with State regulations.

  • Groundwater Wells

    Local source, since 1921

    Montecito Groundwater Basin, managed under the Sustainable Groundwater Management Act.

  • Jameson Lake & Doulton Tunnel

    Local source, since 1930

    District-owned reservoir and conveyance tunnel.

  • Cachuma Project (Lake Cachuma)

    Local source, since 1958

    Federal Bureau of Reclamation entitlement, delivered via the South Coast Conduit.

  • State Water Project

    Imported source, since 1997

    California’s Department of Water Resources runs this user-financed water storage and delivery system throughout the State.

  • Stored Water

    Non-local supply, since 2017

    The District saves surplus wet-year water in Semitropic’s Groundwater Storage Bank for later use.

  • Ocean Desalination

    Local source, since 2022

    50-Year Partnership in the City of Santa Barbara’s Charles E. Meyer Desalination plant.

  • Conservation

    Local source

    Not dependent on rainfall. The less water used, the less water needed. Efficient use reduces costs.

Primary sources of supply planned for use to meet customer demands in the new water year, WY 2027, Oct.1 2026-Sept. 30 2027 include Water Supply Agreement CIty SB (ocean desalination), the Cachuma Project, and Jameson Lake. Water stored in Semitropic is expected to remain in reserve for use in future below-average or dry years. State Water Project (SWP) supplies remain in surplus and are not planned for use in WY 2027; any available SWP 2027 allocation may be stored in Semitropic or transferred (sold) to Homer LLC.

For a detailed overview of the District's water sources and long-term plans, refer to the Urban Water Management Plan.