Deerfield Reservoir Water Level
South Dakota · updated daily from the U.S. Bureau of Reclamation
4.69 ft
Deerfield Reservoir is current reading available and steady (-0.07 ft in the last 7 days).
Change since yesterday: +0.00 ft
Reading as of 2026-08-15
Where Deerfield Reservoir sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
+0.00 ft
7-day change
-0.07 ft
30-day change
-0.48 ft
1-year change
— ft
Last 30 days
Last 12 months
Deerfield Reservoir records and averages
| Current level | 4.69 ft |
|---|---|
| Record high | 6.12 ft (2026-04-17) |
| Record low | 4.68 ft (2026-08-11) |
| Average of all readings | 5.62 ft |
| Data span | 0.3 years (120 readings) |
Frequently asked questions
Is Deerfield Reservoir full right now?
As of 2026-08-15, Deerfield Reservoir sits at 4.69 ft, which is current reading available.Over the past 30 days the level has fallen 0.48 ft.
What is the water level at Deerfield Reservoir today?
The most recent reading is 4.69 ft (2026-08-15), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Deerfield Reservoir has ever been?
The highest level in our records is 6.12 ft on 2026-04-17. The lowest is 4.68 ft on 2026-08-11. Our record covers about 0.3 years of readings.
Why is Deerfield Reservoir changing 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. Deerfield Reservoir has fallen 0.48 ft over the past 30 days. For the operational reason on any given week, check the U.S. Bureau of Reclamation directly.
How much has Deerfield 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 6.12 ft and a record low of 4.68 ft.
Nearby lakes in South Dakota
Source: the U.S. Bureau of Reclamation. Readings are provisional and subject to revision by the publishing agency. All South Dakota lake levels.