South Fork Tolt Reservoir Water Level
Washington · updated daily from the U.S. Geological Survey
1741.46 ft
South Fork Tolt Reservoir is current reading available and falling (-2.38 ft in the last 7 days).
Change since yesterday: -0.24 ft
Reading as of 2026-08-15
Where South Fork Tolt Reservoir sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
-0.24 ft
7-day change
-2.38 ft
30-day change
-10.03 ft
1-year change
— ft
Last 30 days
Last 12 months
South Fork Tolt Reservoir records and averages
| Current level | 1741.46 ft |
|---|---|
| Record high | 1762.99 ft (2026-04-25) |
| Record low | 1741.46 ft (2026-08-15) |
| Average of all readings | 1756.04 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is South Fork Tolt Reservoir full right now?
As of 2026-08-15, South Fork Tolt Reservoir sits at 1741.46 ft, which is current reading available.Over the past 30 days the level has fallen 10.03 ft.
What is the water level at South Fork Tolt Reservoir today?
The most recent reading is 1741.46 ft (2026-08-15), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest South Fork Tolt Reservoir has ever been?
The highest level in our records is 1762.99 ft on 2026-04-25. The lowest is 1741.46 ft on 2026-08-15. Our record covers about 0.3 years of readings.
Why is South Fork Tolt Reservoir low right now?
Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. South Fork Tolt Reservoir has fallen 10.03 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has South Fork Tolt Reservoir changed over the past year?
Year-over-year comparison is not available for this lake yet. The full-history chart above covers 0.3 years, with a record high of 1762.99 ft and a record low of 1741.46 ft.
Nearby lakes in Washington
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Washington lake levels.