Calero Reservoir

Holding 3,974 acre-feet, which is 40.0 percent of its published capacity of 9,934 acre-feet.

Calero Reservoir plotted at latitude 37.1821 and longitude -121.7920 over Valley Water's published major-watershed layer. — Calero Reservoir at 37.1821, -121.7920, exactly as positioned in Valley Water's sensor feed. Guadalupe River is the published polygon whose name matches this portal group. The eleven published polygons do not exactly match the portal's five sensor groups and do not provide a boundary for every named creek.

40.0%

Storage 3,974 acre-feet
Water surface elevation 461.9 ft
Spills at 483.5 ft
Guadalupe watershed
Captured July 28, 2026 at 4:30 PM PT

Reservoir Notes

Elevation data is in 'local' datum, which is similar, but not exactly, in NGVD29 datum. To convert the local datum to NAVD88, add 2.40'.
Valley Water, sensor notes for Calero Reservoir

Gauges Below This Reservoir

Calero Creek below Calero Reservoir
1.39 ft · 0.8 cfs · 2.41 ft below threshold 1