Timestamp: 09-21-2026 07:01:07
STATE OF CALIFORNIA
DEPARTMENT OF WATER RESOURCES
THE RESOURCES AGENCY

DIVISION OF OPERATIONS AND MAINTENANCE

SUMMARY OF SWP RESERVOIR

09-14-2026 to 09-20-2026

All Values in (AF)

Oroville Complex This Week Maximum Day This Week Minimum Day 09-20-2026 Reading Total for Week
Inflow To Lake Oroville 5,751 3,327 4,849 33,517
Total Releases from Hyatt Power Plant (Includes Pumpack) 17,092 8,866 16,183 102,058
River Valve Flow 0 0 0 0
Spill 0 0 0 0
Storage 1,813,452 1,753,516 1,753,516 -
Flood Control - Amount of Encroachment 0 0 0 -
Releases to Feather River (Sum of River Outlet and Diversion Dam Releases) 15,868 12,892 15,868 98,676
Releases to Feather River for Flood Control - - - -
Reservoir Storage Operational Capacity This Year Maximum Storage (1) This Year Minimum Storage (1) Average Storage (2) 09-20-2026 Reading Net Change this Week (3)
Frenchman Lake 55,475 57,038 42,149 32,235 42,149 -374
Lake Davis 84,371 83,169 69,053 56,711 69,053 -653
Antelope Lake 22,564 23,609 18,215 17,926 18,215 -239
Lake Oroville 3,440,276 3,384,884 1,753,516 2,020,117 1,753,516 -70,039
Lake Del Valle 39,914 40,418 28,778 35,288 31,733 -885
San Luis Reservoir Total 2,027,835 1,815,496 1,137,206 852,955 1,412,477 27,291
DWR 1,062,180 1,063,619 614,873 561,618 937,936 16,886
USBR 965,655 784,781 390,989 291,338 474,541 10,405
Pyramid Lake 169,901 169,192 150,446 162,790 163,099 -679
Castaic Lake 319,247 310,429 248,811 253,603 309,362 892
Silverwood Lake 74,970 72,705 49,526 67,554 71,892 866
Lake Perris 132,614 124,647 107,043 96,661 124,214 636
Total (4) 5,401,512 5,329,710 3,082,410 3,304,503 3,521,169 -53,589

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 09/20 from 1979 through 2026.
(3)
Since 09-13-2026.
(4)
Does not include USBR San Luis Reservoir storage.