Reservoir · Oklahoma · United States · USACE CWMS
Oologah Lake
62.5% full
Capacity
1,262.57 hm³
Volume stored
789 hm³
Coordinates
36.422°N, 95.679°W
Last updated
2026-07-30
Current fill
62.5%vs 7 days ago
-0.4%losing
vs 1 year ago
+2.4%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. 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. 36.422, -95.679 · Open in Google Maps
About Oologah Lake
As of July 30, 2026, Oologah Lake is filled to 62.5% of its total capacity, holding roughly 789 hm³ of water out of a maximum 1,263 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 (-0.4 pts), and it is 2.4 points above its level on the same date a year earlier.
Across the readings we hold for Oologah Lake — 329 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 37.2% (September 3, 2021) to a high of 100.0% (June 29, 2026). On average the reservoir is fullest around July and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 36.422°N, 95.679°W.
Key facts
- Current fill level
- 62.5%
- Water stored
- 789 hm³
- Total capacity
- 1,263 hm³
- 7-day change
- ▼ 0.4 pts
- Year-on-year
- ▲ 2.4 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 36.422°N, 95.679°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 62.5% | 789 |
| 29 Jul 2026 | 62.9% | 794 |
| 28 Jul 2026 | 63.8% | 806 |
| 27 Jul 2026 | 64.7% | 817 |
| 26 Jul 2026 | 65.8% | 830 |
| 25 Jul 2026 | 66.8% | 844 |
| 24 Jul 2026 | 67.8% | 856 |
| 23 Jul 2026 | 68.9% | 870 |
| 22 Jul 2026 | 70.0% | 884 |
| 21 Jul 2026 | 71.2% | 898 |
| 20 Jul 2026 | 71.2% | 899 |
| 19 Jul 2026 | 71.9% | 908 |
Frequently asked questions
What is the current water level of Oologah Lake?
As of July 30, 2026, Oologah Lake is at 62.5% of its capacity, holding approximately 789 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Oologah Lake reservoir full?
No. As of July 30, 2026, Oologah Lake is within its normal operating range at 62.5% of its capacity, so it is not full.
Is the water level at Oologah Lake rising or falling?
The level at Oologah Lake has been broadly stable over the latest week on record (-0.4 points).
How much water can Oologah Lake hold?
Oologah Lake has a total capacity of 1,263 hm³.
Where is Oologah Lake reservoir located?
Oologah Lake is located in Oklahoma, United States, within the Oklahoma basin (coordinates 36.422°N, 95.679°W).
What is Oologah Lake used for?
Oologah Lake is used primarily for multiple purposes, and is managed by USACE.