Timestamp: 05-18-2026 07:01:05
STATE OF CALIFORNIA
DEPARTMENT OF WATER RESOURCES
THE RESOURCES AGENCY

DIVISION OF OPERATIONS AND MAINTENANCE

SUMMARY OF SWP RESERVOIR

05-11-2026 to 05-17-2026

All Values in (AF)

Oroville Complex This Week Maximum Day This Week Minimum Day 05-17-2026 Reading Total for Week
Inflow To Lake Oroville 8,566 4,264 5,363 44,902
Total Releases from Hyatt Power Plant (Includes Pumpack) 7,698 3,411 5,876 37,764
River Valve Flow 0 0 0 0
Spill 0 0 0 0
Storage 3,383,807 3,378,428 3,378,582 -
Flood Control - Amount of Encroachment 0 0 0 -
Releases to Feather River (Sum of River Outlet and Diversion Dam Releases) 2,083 2,083 2,083 14,581
Releases to Feather River for Flood Control - - - -
Reservoir Storage Operational Capacity This Year Maximum Storage (1) This Year Minimum Storage (1) Average Storage (2) 05-17-2026 Reading Net Change this Week (3)
Frenchman Lake 55,475 57,038 46,498 42,421 55,239 -585
Lake Davis 84,371 83,169 72,982 66,506 82,413 -597
Antelope Lake 22,564 23,609 19,328 22,307 22,490 -204
Lake Oroville 3,440,276 3,383,807 2,404,046 2,865,510 3,378,582 5,072
Lake Del Valle 39,914 40,418 28,778 39,717 39,533 413
San Luis Reservoir Total 2,027,835 1,815,496 1,405,750 1,574,042 1,609,782 -51,191
DWR 1,062,180 1,063,619 846,213 840,792 846,213 -37,177
USBR 965,655 784,781 445,304 733,250 763,569 -14,014
Pyramid Lake 169,901 169,025 150,446 163,256 161,645 -2,461
Castaic Lake 319,247 289,237 248,811 284,244 287,087 4,148
Silverwood Lake 74,970 72,436 49,526 69,240 72,121 -134
Lake Perris 132,614 124,647 107,043 104,797 117,398 -22
Total (4) 5,401,512 5,307,005 3,973,671 4,498,790 5,062,721 -31,547

Data is preliminary and subject to revision.

Footnotes

(1)
Maximum and Minimum storage in the year the week begins (2026).
(2)
Average storage for each 05/17 from 1979 through 2026.
(3)
Since 05-10-2026.
(4)
Does not include USBR San Luis Reservoir storage.