Reservoir · Oklahoma · United States · USGS NWIS
Lake Eucha
82.9% full
Capacity
98.19 hm³
Volume stored
81 hm³
Coordinates
36.375°N, 94.935°W
Last updated
2026-08-13
Current fill
82.9%vs 7 days ago
-0.6%losing
vs 1 year ago
+0.7%year-over-year
7-day trend
→stable
Data source: USGS National Water Information System (NWIS) — 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: 2026-08-13.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.375, -94.935 · Open in Google Maps
About Lake Eucha
As of August 13, 2026, Lake Eucha is filled to 82.9% of its total capacity, holding roughly 81 hm³ of water out of a maximum 98 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.6 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Lake Eucha — 1461 data points between August 14, 2022 and August 13, 2026 — the level has ranged from a low of 65.6% (February 10, 2025) to a high of 100.8% (May 7, 2024). On average the reservoir is fullest around May and at its lowest around November.
It is operated by USGS primarily for multiple purposes. It lies within the Oklahoma basin at 36.375°N, 94.935°W.
Key facts
- Current fill level
- 82.9%
- Water stored
- 81 hm³
- Total capacity
- 98 hm³
- 7-day change
- ▼ 0.6 pts
- Year-on-year
- ▲ 0.7 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USGS
- Coordinates
- 36.375°N, 94.935°W
- Last updated
- August 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Aug 2026 | 82.9% | 81 |
| 12 Aug 2026 | 83.0% | 82 |
| 11 Aug 2026 | 83.1% | 82 |
| 10 Aug 2026 | 83.2% | 82 |
| 9 Aug 2026 | 83.3% | 82 |
| 8 Aug 2026 | 83.4% | 82 |
| 7 Aug 2026 | 83.5% | 82 |
| 6 Aug 2026 | 83.5% | 82 |
| 5 Aug 2026 | 83.5% | 82 |
| 4 Aug 2026 | 83.5% | 82 |
| 3 Aug 2026 | 83.5% | 82 |
| 2 Aug 2026 | 83.4% | 82 |
Frequently asked questions
What is the current water level of Lake Eucha?
As of August 13, 2026, Lake Eucha is at 82.9% of its capacity, holding approximately 81 hm³ of water, according to USGS NWIS data.
Is Lake Eucha reservoir full?
No. As of August 13, 2026, Lake Eucha is high at 82.9% of its capacity, so it is not full.
Is the water level at Lake Eucha rising or falling?
The level at Lake Eucha has been broadly stable over the latest week on record (-0.6 points).
How much water can Lake Eucha hold?
Lake Eucha has a total capacity of 98 hm³.
Where is Lake Eucha reservoir located?
Lake Eucha is located in Oklahoma, United States, within the Oklahoma basin (coordinates 36.375°N, 94.935°W).
What is Lake Eucha used for?
Lake Eucha is used primarily for multiple purposes, and is managed by USGS.