Watershed Sanitary Surveys

Watershed Sanitary Surveys are required byt the State Water Resources Control Board Division of Drinking Water for all surface water influenced water supplies. The surveys must be updated every 5 years, with 4 main goals:

  1. Identify existing sources of water contamination.
  2. Identify potential future sources of water contamination.
  3. Provide a baseline of water quality and watershed condition for identification of trends in future survey updates.
  4. Recommend watershed management practices that will protect raw water quality of this valuable local water source and minimize the need to import water.

Click on each location below to view their Watershed Sanitary Survey:

Lopez Lake and Terminal


Santa Margarita Area


Salinas Reservoir


Nacimiento Lake


Nacimiento Water Project


Whale Rock Reservoir