Stillwater Reservoir Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Stillwater Reservoir water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Stillwater Reservoir been doing?
Across the available 30-day series, Stillwater Reservoir is falling overall. The measured range runs from 1,667.64 ft to 1,670.97 ft, with a net change of -3.29 ft.
Lake levels can respond to rainfall, watershed inflow, dam and hydropower operations, seasonal target elevations, evaporation and downstream release requirements. This page reports what the matched sensor measured; it does not infer why an operator changed a reservoir.
Recent daily levels
| Date | Low | Average | High |
|---|---|---|---|
| Oct 7 | 1667.64 ft | 1667.69 ft | 1667.72 ft |
| Oct 6 | 1667.70 ft | 1667.75 ft | 1667.81 ft |
| Oct 5 | 1667.78 ft | 1667.83 ft | 1667.89 ft |
| Oct 4 | 1667.88 ft | 1667.94 ft | 1667.99 ft |
| Oct 3 | 1667.99 ft | 1668.04 ft | 1668.09 ft |
| Oct 2 | 1668.07 ft | 1668.10 ft | 1668.13 ft |
| Oct 1 | 1668.12 ft | 1668.16 ft | 1668.22 ft |
| Sep 30 | 1668.21 ft | 1668.26 ft | 1668.31 ft |
| Sep 29 | 1668.30 ft | 1668.35 ft | 1668.41 ft |
| Sep 28 | 1668.40 ft | 1668.45 ft | 1668.53 ft |
| Sep 27 | 1668.50 ft | 1668.58 ft | 1668.65 ft |
| Sep 26 | 1668.64 ft | 1668.71 ft | 1668.78 ft |
| Sep 25 | 1668.77 ft | 1668.84 ft | 1668.91 ft |
| Sep 24 | 1668.91 ft | 1668.97 ft | 1669.04 ft |
| Sep 23 | 1669.03 ft | 1669.10 ft | 1669.16 ft |
| Sep 22 | 1669.16 ft | 1669.23 ft | 1669.30 ft |
| Sep 21 | 1669.29 ft | 1669.36 ft | 1669.43 ft |
| Sep 20 | 1669.42 ft | 1669.48 ft | 1669.52 ft |
| Sep 19 | 1669.52 ft | 1669.59 ft | 1669.66 ft |
| Sep 18 | 1669.66 ft | 1669.72 ft | 1669.78 ft |
| Sep 17 | 1669.79 ft | 1669.85 ft | 1669.91 ft |
| Sep 16 | 1669.91 ft | 1669.97 ft | 1670.04 ft |
| Sep 15 | 1670.02 ft | 1670.10 ft | 1670.17 ft |
| Sep 14 | 1670.16 ft | 1670.23 ft | 1670.29 ft |
| Sep 13 | 1670.28 ft | 1670.35 ft | 1670.40 ft |
| Sep 12 | 1670.38 ft | 1670.46 ft | 1670.52 ft |
| Sep 11 | 1670.52 ft | 1670.58 ft | 1670.65 ft |
| Sep 10 | 1670.61 ft | 1670.67 ft | 1670.75 ft |
| Sep 9 | 1670.70 ft | 1670.74 ft | 1670.78 ft |
| Sep 8 | 1670.78 ft | 1670.84 ft | 1670.91 ft |
Stillwater Reservoir level-history FAQ
How has Stillwater Reservoir water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is -3.29 ft and the overall direction is falling.
What was the highest Stillwater Reservoir level in the last 30 days?
The highest reading in the available 30-day series is 1,670.97 ft.
What was the lowest Stillwater Reservoir level in the last 30 days?
The lowest reading in the available 30-day series is 1,667.64 ft.
Are historical USGS lake readings final?
Not always. Recent readings may be marked provisional and can be revised by the source agency after quality review.