Timestamp: 06-01-2026 07:01:05
STATE OF CALIFORNIA
DEPARTMENT OF WATER RESOURCES
THE RESOURCES AGENCY

DIVISION OF OPERATIONS AND MAINTENANCE

SUMMARY OF SWP RESERVOIR

05-25-2026 to 05-31-2026

All Values in (AF)

Oroville Complex This Week Maximum Day This Week Minimum Day 05-31-2026 Reading Total for Week
Inflow To Lake Oroville 6,814 4,274 5,323 39,761
Total Releases from Hyatt Power Plant (Includes Pumpack) 11,871 7,670 9,115 68,362
River Valve Flow 0 0 0 0
Spill 0 0 0 0
Storage 3,356,796 3,331,618 3,331,618 -
Flood Control - Amount of Encroachment 0 0 0 -
Releases to Feather River (Sum of River Outlet and Diversion Dam Releases) 5,951 3,335 5,951 36,384
Releases to Feather River for Flood Control - - - -
Reservoir Storage Operational Capacity This Year Maximum Storage (1) This Year Minimum Storage (1) Average Storage (2) 05-31-2026 Reading Net Change this Week (3)
Frenchman Lake 55,475 57,038 46,498 41,715 54,003 -671
Lake Davis 84,371 83,169 72,982 66,208 81,542 -237
Antelope Lake 22,564 23,609 19,328 22,149 22,222 -74
Lake Oroville 3,440,276 3,384,884 2,404,046 2,886,540 3,331,618 -30,081
Lake Del Valle 39,914 40,418 28,778 39,771 39,794 -78
San Luis Reservoir Total 2,027,835 1,815,496 1,405,750 1,463,236 1,502,980 -62,781
DWR 1,062,180 1,063,619 776,000 790,939 776,000 -32,358
USBR 965,655 784,781 445,304 672,298 726,980 -30,423
Pyramid Lake 169,901 169,025 150,446 163,809 165,396 3,376
Castaic Lake 319,247 298,464 248,811 282,244 297,038 2,882
Silverwood Lake 74,970 72,436 49,526 69,282 71,987 -143
Lake Perris 132,614 124,647 107,043 104,371 117,643 245
Total (4) 5,401,512 5,317,309 3,903,458 4,467,028 4,957,243 -57,139

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 05/31 from 1979 through 2026.
(3)
Since 05-24-2026.
(4)
Does not include USBR San Luis Reservoir storage.