Reservoir · Ohio · United States · USACE CWMS
Dillon Lake
65.7% full
Capacity
21.59 hm³
Volume stored
14 hm³
Coordinates
39.992°N, 82.082°W
Last updated
2026-07-30
Current fill
65.7%vs 7 days ago
0.0%stable
vs 1 year ago
+0.9%year-over-year
7-day trend
→stable
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: 2026-07-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.992, -82.082 · Open in Google Maps
About Dillon Lake
As of July 30, 2026, Dillon Lake is filled to 65.7% of its total capacity, holding roughly 14 hm³ of water out of a maximum 22 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Dillon Lake — 100 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 62.2% (June 21, 2026) to a high of 91.3% (September 1, 2021).
It is operated by USACE primarily for multiple purposes. It lies within the Ohio basin at 39.992°N, 82.082°W.
Key facts
- Current fill level
- 65.7%
- Water stored
- 14 hm³
- Total capacity
- 22 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 0.9 pts
- Primary use
- Multipurpose
- River basin
- Ohio
- Operator
- USACE
- Coordinates
- 39.992°N, 82.082°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 65.7% | 14 |
| 29 Jul 2026 | 65.7% | 14 |
| 28 Jul 2026 | 67.2% | 15 |
| 27 Jul 2026 | 66.8% | 14 |
| 26 Jul 2026 | 64.4% | 14 |
| 25 Jul 2026 | 65.2% | 14 |
| 24 Jul 2026 | 68.1% | 15 |
| 23 Jul 2026 | 69.4% | 15 |
| 22 Jul 2026 | 78.4% | 17 |
| 21 Jul 2026 | 66.9% | 14 |
| 20 Jul 2026 | 66.3% | 14 |
| 19 Jul 2026 | 68.3% | 15 |
Frequently asked questions
What is the current water level of Dillon Lake?
As of July 30, 2026, Dillon Lake is at 65.7% of its capacity, holding approximately 14 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Dillon Lake reservoir full?
No. As of July 30, 2026, Dillon Lake is within its normal operating range at 65.7% of its capacity, so it is not full.
Is the water level at Dillon Lake rising or falling?
The level at Dillon Lake has been broadly stable over the latest week on record (0.0 points).
How much water can Dillon Lake hold?
Dillon Lake has a total capacity of 22 hm³.
Where is Dillon Lake reservoir located?
Dillon Lake is located in Ohio, United States, within the Ohio basin (coordinates 39.992°N, 82.082°W).
What is Dillon Lake used for?
Dillon Lake is used primarily for multiple purposes, and is managed by USACE.