Allegheny Reservoir Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Allegheny Reservoir water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Allegheny Reservoir been doing?
Across the available 30-day series, Allegheny Reservoir is falling overall. The measured range runs from 1,324.33 ft to 1,329.33 ft, with a net change of -2.42 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 | 1324.33 ft | 1324.56 ft | 1324.87 ft |
| Oct 6 | 1324.79 ft | 1324.92 ft | 1325.22 ft |
| Oct 5 | 1325.03 ft | 1325.37 ft | 1325.80 ft |
| Oct 4 | 1325.58 ft | 1325.92 ft | 1326.46 ft |
| Oct 3 | 1326.20 ft | 1326.46 ft | 1326.89 ft |
| Oct 2 | 1326.63 ft | 1326.91 ft | 1327.37 ft |
| Oct 1 | 1327.12 ft | 1327.32 ft | 1327.69 ft |
| Sep 30 | 1327.32 ft | 1327.49 ft | 1327.72 ft |
| Sep 29 | 1327.51 ft | 1327.70 ft | 1327.96 ft |
| Sep 28 | 1327.63 ft | 1327.86 ft | 1328.08 ft |
| Sep 27 | 1327.81 ft | 1328.04 ft | 1328.30 ft |
| Sep 26 | 1328.05 ft | 1328.20 ft | 1328.38 ft |
| Sep 25 | 1328.19 ft | 1328.36 ft | 1328.61 ft |
| Sep 24 | 1328.35 ft | 1328.55 ft | 1328.75 ft |
| Sep 23 | 1328.54 ft | 1328.71 ft | 1328.90 ft |
| Sep 22 | 1328.66 ft | 1328.81 ft | 1329.00 ft |
| Sep 21 | 1328.60 ft | 1328.81 ft | 1328.97 ft |
| Sep 20 | 1328.70 ft | 1328.93 ft | 1329.24 ft |
| Sep 19 | 1328.72 ft | 1329.00 ft | 1329.27 ft |
| Sep 18 | 1328.89 ft | 1329.13 ft | 1329.33 ft |
| Sep 17 | 1328.81 ft | 1329.01 ft | 1329.29 ft |
| Sep 16 | 1328.67 ft | 1328.83 ft | 1329.15 ft |
| Sep 15 | 1328.31 ft | 1328.49 ft | 1328.89 ft |
| Sep 14 | 1327.96 ft | 1328.16 ft | 1328.51 ft |
| Sep 13 | 1327.50 ft | 1327.76 ft | 1328.15 ft |
| Sep 12 | 1327.27 ft | 1327.57 ft | 1327.93 ft |
| Sep 11 | 1327.15 ft | 1327.46 ft | 1327.82 ft |
| Sep 10 | 1326.89 ft | 1327.21 ft | 1327.61 ft |
| Sep 9 | 1326.80 ft | 1327.05 ft | 1327.38 ft |
| Sep 8 | 1326.80 ft | 1327.01 ft | 1327.34 ft |
Allegheny Reservoir level-history FAQ
How has Allegheny Reservoir water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is -2.42 ft and the overall direction is falling.
What was the highest Allegheny Reservoir level in the last 30 days?
The highest reading in the available 30-day series is 1,329.33 ft.
What was the lowest Allegheny Reservoir level in the last 30 days?
The lowest reading in the available 30-day series is 1,324.33 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.