New website by Stoa. Not the official Valley Water website.

Surface Water Data Portal

Demo snapshot · July 28, 2026 at 4:53 PM PT · not current conditions

Storage

Reservoirs

Ten reservoirs in the foothills, holding winter rain above the valley floor. What they release, and what they spill, arrives at the creek gauges below.

Ten Valley Water reservoirs plotted at their published coordinates; marker area increases with percent of published capacity currently stored.
All ten reservoirs at their sensor-feed coordinates. Larger square markers indicate a higher percentage of published capacity currently stored. All eleven polygons in Valley Water's published major-watershed layer are shown. The eleven published polygons do not exactly match the portal's five sensor groups and do not provide a boundary for every named creek.
  • Reservoir
Current storage at each Valley Water reservoir against published capacity
ReservoirWatershedStorageCapacityPercent full
Almaden Reservoir Guadalupe 1,093 acre-feet 1,586 acre-feet 68.9%
Anderson Reservoir Coyote 3,508 acre-feet 89,073 acre-feet 3.9%
Calero Reservoir Guadalupe 3,974 acre-feet 9,934 acre-feet 40.0%
Chesbro Reservoir Pajaro 3,889 acre-feet 7,945 acre-feet 49.0%
Coyote Reservoir Coyote 9,840 acre-feet 23,244 acre-feet 42.3%
Guadalupe Reservoir Guadalupe 1,296 acre-feet 3,415 acre-feet 38.0%
Lexington Reservoir Guadalupe 11,408 acre-feet 19,044 acre-feet 59.9%
Stevens Creek Reservoir Lower Peninsula 2,647 acre-feet 3,138 acre-feet 84.3%
Uvas Reservoir Pajaro 5,063 acre-feet 9,835 acre-feet 51.5%
Vasona Reservoir Guadalupe 440 acre-feet 400 acre-feet 110.1%

Capacities are Valley Water's published figures. Anderson has been restricted since October 2020 under a federal seismic order, which is why its storage sits far below capacity.