Reservoir · Oklahoma · United States · USGS NWIS
Lake Ellsworth
27.0% full
Capacity
73.36 hm³
Volume stored
20 hm³
Coordinates
34.795°N, 98.369°W
Last updated
2026-09-30
Current fill
27.0%vs 7 days ago
0.0%stable
vs 1 year ago
-36.3%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: 2026-09-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.795, -98.369 · Open in Google Maps
About Lake Ellsworth
As of September 30, 2026, Lake Ellsworth is filled to 27.0% of its total capacity, holding roughly 20 hm³ of water out of a maximum 73 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 36.3 points below its level on the same date a year earlier.
Across the readings we hold for Lake Ellsworth — 1461 data points between October 1, 2022 and September 30, 2026 — the level has ranged from a low of 26.8% (September 11, 2026) to a high of 105.0% (May 2, 2024). On average the reservoir is fullest around May and at its lowest around September.
It is operated by USGS primarily for multiple purposes. It lies within the Oklahoma basin at 34.795°N, 98.369°W.
Key facts
- Current fill level
- 27.0%
- Water stored
- 20 hm³
- Total capacity
- 73 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 36.3 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USGS
- Coordinates
- 34.795°N, 98.369°W
- Last updated
- September 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Sep 2026 | 27.0% | 20 |
| 29 Sep 2026 | 27.0% | 20 |
| 28 Sep 2026 | 27.0% | 20 |
| 27 Sep 2026 | 27.0% | 20 |
| 26 Sep 2026 | 27.0% | 20 |
| 25 Sep 2026 | 27.0% | 20 |
| 24 Sep 2026 | 27.0% | 20 |
| 23 Sep 2026 | 27.0% | 20 |
| 22 Sep 2026 | 27.0% | 20 |
| 21 Sep 2026 | 27.1% | 20 |
| 20 Sep 2026 | 27.0% | 20 |
| 19 Sep 2026 | 27.0% | 20 |