Onondaga Reservoir Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Onondaga Reservoir water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Onondaga Reservoir been doing?
Across the available 30-day series, Onondaga Reservoir is falling overall. The measured range runs from 459.34 ft to 460 ft, with a net change of -0.07 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 | 459.37 ft | 459.38 ft | 459.41 ft |
| Oct 6 | 459.35 ft | 459.37 ft | 459.38 ft |
| Oct 5 | 459.34 ft | 459.37 ft | 459.40 ft |
| Oct 4 | 459.37 ft | 459.39 ft | 459.41 ft |
| Oct 3 | 459.40 ft | 459.42 ft | 459.43 ft |
| Oct 2 | 459.40 ft | 459.42 ft | 459.43 ft |
| Oct 1 | 459.41 ft | 459.43 ft | 459.44 ft |
| Sep 30 | 459.43 ft | 459.45 ft | 459.46 ft |
| Sep 29 | 459.46 ft | 459.48 ft | 459.51 ft |
| Sep 28 | 459.46 ft | 459.50 ft | 459.53 ft |
| Sep 27 | 459.40 ft | 459.42 ft | 459.46 ft |
| Sep 26 | 459.38 ft | 459.39 ft | 459.41 ft |
| Sep 25 | 459.36 ft | 459.39 ft | 459.40 ft |
| Sep 24 | 459.37 ft | 459.39 ft | 459.40 ft |
| Sep 23 | 459.38 ft | 459.40 ft | 459.44 ft |
| Sep 22 | 459.44 ft | 459.45 ft | 459.47 ft |
| Sep 21 | 459.46 ft | 459.48 ft | 459.50 ft |
| Sep 20 | 459.48 ft | 459.49 ft | 459.51 ft |
| Sep 19 | 459.49 ft | 459.51 ft | 459.53 ft |
| Sep 18 | 459.53 ft | 459.55 ft | 459.56 ft |
| Sep 17 | 459.53 ft | 459.55 ft | 459.56 ft |
| Sep 16 | 459.55 ft | 459.58 ft | 459.61 ft |
| Sep 15 | 459.55 ft | 459.59 ft | 459.65 ft |
| Sep 14 | 459.58 ft | 459.68 ft | 459.73 ft |
| Sep 13 | 459.48 ft | 459.52 ft | 459.62 ft |
| Sep 12 | 459.48 ft | 459.51 ft | 459.55 ft |
| Sep 11 | 459.55 ft | 459.61 ft | 459.67 ft |
| Sep 10 | 459.67 ft | 459.82 ft | 460.00 ft |
| Sep 9 | 459.40 ft | 459.48 ft | 459.76 ft |
| Sep 8 | 459.42 ft | 459.43 ft | 459.44 ft |
Onondaga Reservoir level-history FAQ
How has Onondaga Reservoir water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is -0.07 ft and the overall direction is falling.
What was the highest Onondaga Reservoir level in the last 30 days?
The highest reading in the available 30-day series is 460 ft.
What was the lowest Onondaga Reservoir level in the last 30 days?
The lowest reading in the available 30-day series is 459.34 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.