Lake levels
William H. Harsha Lake, OH
- water level
- 731.21 ft
- Condition
- Above average for this time of year
- 7-day change
- -0.21 ft
- Below full
- 1.79 ft
- 30-day change
- -3.19 ft
Reading as of 2026-10-13 | the U.S. Army Corps of Engineers
- Since yesterday
- -0.02 ft
- 7-day change
- -0.21 ft
- 30-day change
- -3.19 ft
- Below full
- 1.79 ft
- 1-year change
- +0.23 ft
In brief
William H. Harsha Lake stood at 731.21 feet on Oct 13, 2026, 1.79 feet below its full pool of 733 feet. That is higher than 77% of October readings since 2013.
Source: U.S. Army Corps of Engineers
Lake level timeline
Records and averages
| Current level | 731.21 ft |
|---|---|
| Full pool (conservation) | 733.00 ft |
| Flood pool | 795.00 ft |
| Record high | 763.50 ft (2018-03-02) |
| Record low | 728.58 ft (2019-10-26) |
| Average of all readings | 732.39 ft |
| Data span | 12 years (4,671 readings) |
Level schematic
Frequently asked questions
Is William H. Harsha Lake full right now?
As of 2026-10-13, William H. Harsha Lake sits at 731.21 ft, which is above average for this time of year. That is 1.79 ft below full pool of 733.00 ft. Over the past 30 days the level has fallen 3.19 ft.
What is the water level at William H. Harsha Lake today?
The most recent reading at William H. Harsha Lake is 731.21 ft (2026-10-13), sourced from the U.S. Army Corps of Engineers. Readings on this page refresh automatically as the agency publishes new data.
What is the highest William H. Harsha Lake has ever been?
The highest level for William H. Harsha Lake in our records is 763.50 ft on 2018-03-02. The lowest is 728.58 ft on 2019-10-26. Our record covers about 12 years of readings.
Is William H. Harsha Lake low for this time of year?
Compared with every October in our records, the current level is higher than 77% of them, which we classify as above average for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.
Why is William H. Harsha Lake low 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. William H. Harsha Lake has fallen 3.19 ft over the past 30 days. For the operational reason on any given week, check the U.S. Army Corps of Engineers directly.
How much has William H. Harsha Lake changed over the past year?
William H. Harsha Lake is +0.23 ft compared with this date last year (731.21 ft today). The full-history chart above covers 12 years, with a record high of 763.50 ft and a record low of 728.58 ft.
Download and cite
Quote this reading
William H. Harsha Lake stood at 731.21 feet on Oct 13, 2026, 1.79 feet below its full pool of 733 feet. That is higher than 77% of October readings since 2013.
Download the full record
william-h-harsha-lake-oh-water-level-history.csv
How to cite
MyWaterLevel, “William H. Harsha Lake water level, 2013 to 2026,” data from U.S. Army Corps of Engineers, https://mywaterlevel.com/lake/oh/william-h-harsha-lake/, accessed Oct 13, 2026.
Source: the U.S. Army Corps of Engineers. All Ohio lake levels. Readings are provisional and may be revised. About our data and methods.