Lower Crystal Springs Reservoir
RESERVOIR REPORT
September 29 202350,123 acre-ft
None% todayNone% of Normal • Very Low
Water storage levels at Lower Crystal Springs Reservoir are currently 50,123 acre-ft, about None% of normal. The average for this time of year is approximately Noneacre-ft. Maximum recorded Storage since record keeping began in 2021 was 2023-01-16 when levels reached 65,788 acre-ft. Lowest recorded Storage was 2022-03-21 when levels receded to 42,876 acre-ft. View historical levels.
Lower Crystal Springs Reservoir is a man-made reservoir located on the northern end of the Santa Clara Valley in California. The reservoir was built in 1888 to provide drinking water to the residents of San Francisco. The hydrology of the reservoir is primarily controlled by the San Andreas Fault, which runs directly under the reservoir. The reservoir is fed by surface flows from the San Mateo Creek and is also a snowpack provider during the winter months. The water from the reservoir is used for municipal purposes and agricultural irrigation. Recreational uses of the reservoir include fishing, boating, and hiking. The reservoir is home to a variety of fish species, including bass, catfish, and bluegill.

Geolocation | -122.356, 37.515 |
Elevation | 293 ft |
Storage 24hr Change | None% |
Percent of Normal | None% |
Minimum |
42,876 acre-ft
2022-03-21 |
Maximum |
65,788 acre-ft
2023-01-16 |
Average | acre-ft |
AREA SURFACE FLOWS
Streamgauge | Streamflow | Stage |
---|---|---|
ARROYO VALLE BL LANG CN NR LIVERMORE CA | 0 cfs | 0.9 ft |
SAN ANTONIO C NR SUNOL CA | 0 cfs | 2.8 ft |
ALAMEDA C NR NILES CA | 21 cfs | 2.8 ft |
PILARCITOS C BL STONE DAM NR HILLSBOROUGH CA | 2 cfs | 5.0 ft |
ALAMEDA C FLOOD CHANNEL A UNION CITY CA | 40 cfs | 7.1 ft |
ALAMEDA C BL WELCH C NR SUNOL CA | 15 cfs | 11.4 ft |