Reservoir · Ohio · United States · USACE CWMS
Delaware Lake
103.2% full
Capacity
17.27 hm³
Volume stored
18 hm³
Coordinates
40.359°N, 83.069°W
Last updated
2026-07-30
Current fill
103.2%vs 7 days ago
-0.2%losing
vs 1 year ago
+5.8%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. 40.359, -83.069 · Open in Google Maps
About Delaware Lake
As of July 30, 2026, Delaware Lake is filled to 103.2% of its total capacity, holding roughly 18 hm³ of water out of a maximum 17 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (-0.2 pts), and it is 5.8 points above its level on the same date a year earlier.
Across the readings we hold for Delaware Lake — 100 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 96.4% (September 20, 2021) to a high of 105.0% (August 13, 2021).
It is operated by USACE primarily for multiple purposes. It lies within the Ohio basin at 40.359°N, 83.069°W.
Key facts
- Current fill level
- 103.2%
- Water stored
- 18 hm³
- Total capacity
- 17 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▲ 5.8 pts
- Primary use
- Multipurpose
- River basin
- Ohio
- Operator
- USACE
- Coordinates
- 40.359°N, 83.069°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 103.2% | 18 |
| 29 Jul 2026 | 103.4% | 18 |
| 28 Jul 2026 | 104.2% | 18 |
| 27 Jul 2026 | 104.1% | 18 |
| 26 Jul 2026 | 104.7% | 18 |
| 25 Jul 2026 | 105.0% | 18 |
| 24 Jul 2026 | 105.0% | 18 |
| 23 Jul 2026 | 105.0% | 18 |
| 22 Jul 2026 | 105.0% | 18 |
| 21 Jul 2026 | 105.0% | 18 |
| 20 Jul 2026 | 105.0% | 18 |
| 19 Jul 2026 | 105.0% | 18 |
Frequently asked questions
What is the current water level of Delaware Lake?
As of July 30, 2026, Delaware Lake is at 103.2% of its capacity, holding approximately 18 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Delaware Lake reservoir full?
Delaware Lake is essentially full, sitting at 103.2% of capacity as of July 30, 2026.
Is the water level at Delaware Lake rising or falling?
The level at Delaware Lake has been broadly stable over the latest week on record (-0.2 points).
How much water can Delaware Lake hold?
Delaware Lake has a total capacity of 17 hm³.
Where is Delaware Lake reservoir located?
Delaware Lake is located in Ohio, United States, within the Ohio basin (coordinates 40.359°N, 83.069°W).
What is Delaware Lake used for?
Delaware Lake is used primarily for multiple purposes, and is managed by USACE.