Prompton Reservoir Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Prompton Reservoir water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Prompton Reservoir been doing?
Across the available 30-day series, Prompton Reservoir is falling overall. The measured range runs from 1,124.81 ft to 1,126.61 ft, with a net change of -0.23 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 9 | 1125.03 ft | 1125.03 ft | 1125.03 ft |
| Oct 8 | 1125.03 ft | 1125.09 ft | 1125.15 ft |
| Oct 7 | 1125.15 ft | 1125.22 ft | 1125.29 ft |
| Oct 6 | 1125.29 ft | 1125.37 ft | 1125.45 ft |
| Oct 5 | 1125.45 ft | 1125.53 ft | 1125.62 ft |
| Oct 4 | 1125.62 ft | 1125.73 ft | 1125.84 ft |
| Oct 3 | 1125.84 ft | 1125.96 ft | 1126.07 ft |
| Oct 2 | 1126.07 ft | 1126.18 ft | 1126.28 ft |
| Oct 1 | 1126.28 ft | 1126.38 ft | 1126.48 ft |
| Sep 30 | 1126.48 ft | 1126.55 ft | 1126.60 ft |
| Sep 29 | 1126.33 ft | 1126.54 ft | 1126.61 ft |
| Sep 28 | 1125.79 ft | 1126.03 ft | 1126.33 ft |
| Sep 27 | 1125.66 ft | 1125.69 ft | 1125.78 ft |
| Sep 26 | 1125.71 ft | 1125.76 ft | 1125.82 ft |
| Sep 25 | 1125.82 ft | 1125.88 ft | 1125.94 ft |
| Sep 24 | 1125.94 ft | 1126.02 ft | 1126.09 ft |
| Sep 23 | 1126.09 ft | 1126.19 ft | 1126.28 ft |
| Sep 22 | 1126.27 ft | 1126.34 ft | 1126.37 ft |
| Sep 21 | 1125.62 ft | 1126.16 ft | 1126.37 ft |
| Sep 20 | 1124.81 ft | 1124.97 ft | 1125.59 ft |
| Sep 19 | 1124.81 ft | 1124.82 ft | 1124.83 ft |
| Sep 18 | 1124.82 ft | 1124.83 ft | 1124.84 ft |
| Sep 17 | 1124.84 ft | 1124.86 ft | 1124.88 ft |
| Sep 16 | 1124.88 ft | 1124.91 ft | 1124.94 ft |
| Sep 15 | 1124.93 ft | 1124.96 ft | 1124.99 ft |
| Sep 14 | 1124.98 ft | 1125.00 ft | 1125.03 ft |
| Sep 13 | 1125.01 ft | 1125.04 ft | 1125.08 ft |
| Sep 12 | 1125.08 ft | 1125.12 ft | 1125.15 ft |
| Sep 11 | 1125.15 ft | 1125.18 ft | 1125.20 ft |
| Sep 10 | 1125.20 ft | 1125.22 ft | 1125.24 ft |
Prompton Reservoir level-history FAQ
How has Prompton Reservoir water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is -0.23 ft and the overall direction is falling.
What was the highest Prompton Reservoir level in the last 30 days?
The highest reading in the available 30-day series is 1,126.61 ft.
What was the lowest Prompton Reservoir level in the last 30 days?
The lowest reading in the available 30-day series is 1,124.81 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.