Reservoir · Ohio · United States · USACE CWMS
William H. Harsha Lake
91.7% full
Capacity
114.22 hm³
Volume stored
105 hm³
Vs month average
98% of normal
Coordinates
39.022°N, 84.151°W
Last updated
2026-10-28
Current fill
91.7%vs 7 days ago
-0.5 pplosing
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
98%of normal
91.7% full on 2026-10-28, against an average of 93.4% for October across 2 years of readings (-1.7 points).
Drought Monitor at this site · 20 October 2026
D0abnormally dry
The ground at William H. Harsha Lake's coordinates falls inside the D0 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Ohio drought figures →
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.022°N, 84.151°W · Open in Google Maps
About William H. Harsha Lake
As of October 28, 2026, William H. Harsha Lake is filled to 91.7% of its total capacity, holding 104.71 hm³ of water out of a maximum 114.22 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.5 pp).
Across the readings we hold for William H. Harsha Lake — 307 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 88.5% (January 22, 2022) to a high of 104.8% (August 13, 2026). On average the reservoir is fullest around July and at its lowest around December.
It is operated by USACE primarily for multiple purposes. It is at 39.022°N, 84.151°W.
Key facts
- Current fill level
- 91.7% of total capacity
- Water stored
- 104.71 hm³
- Total capacity
- 114.22 hm³
- 7-day change
- ▼ 0.5 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 39.022°N, 84.151°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 91.7% | 104.71 |
| 27 Oct 2026 | 91.7% | 104.74 |
| 26 Oct 2026 | 91.8% | 104.83 |
| 25 Oct 2026 | 91.8% | 104.91 |
| 24 Oct 2026 | 91.9% | 105.01 |
| 23 Oct 2026 | 92.0% | 105.09 |
| 22 Oct 2026 | 92.1% | 105.19 |
| 21 Oct 2026 | 92.2% | 105.29 |
| 20 Oct 2026 | 92.3% | 105.39 |
| 19 Oct 2026 | 92.4% | 105.52 |
| 18 Oct 2026 | 92.6% | 105.74 |
| 17 Oct 2026 | 92.8% | 105.97 |