Basins
Near normalSacramento basin
Reservoir storage across California
Data through Aug 26, 2026 · source last checked Aug 27, 2026 · page revised Aug 27, 2026
Cite
- Shasta Lake
- Whiskeytown Lake
About this data
- Source
- US Bureau of Reclamation RISE; California reservoirs via CA DWR CDEC
- Series
- Reservoir storage summed across the basin
- Geography
- Sacramento basin
- Unit
- acre-feet
- Calculation
- Daily reading
- Last observation
- Aug 26, 2026
- Update frequency
- Daily
Now 2.92M af, 7% below the 5-yr median.
Sacramento basin storage stands at 2.92M af, down 3.3% on the week. The basin runs 7% below the 5-year median. Storage dropped 13.1% month over month. Year over year, it is down 6.9%.
| Period | Current | Prior | Change |
|---|---|---|---|
| Week over week | 2.92M af | 3.02M af | -3.3% |
| Month over month | 2.92M af | 3.36M af | -13.1% |
| Year over year | 2.92M af | 3.14M af | -6.9% |
| vs 5-yr median | 2.92M af | 3.14M af | -6.9% |
Previous weeks
Week of Aug 19, 2026
Sacramento basin storage fell to 3.02M af, down 2.7% on the week but 13.5% over the month. The basin sat 6% below its 5-year median.
An earlier week
Sacramento basin storage stands at 3.10M af, down 3.4% on the week. Month-over-month the basin is down 13.7%, reflecting summer drawdown. Current storage runs 5% below the 5-year median.
Week of Aug 13, 2026
Sacramento basin storage fell to 3.15M af, down 13.5% over the month. The basin runs 5% below its 5-year median and 4.9% below last year's level.