Reservoir · California · United States · CDEC
Lake Oroville
69.9% full
Capacity
4,366.53 hm³
Volume stored
3053 hm³
Coordinates
39.540°N, 121.493°W
Last updated
2026-08-02
Current fill
69.9%vs 7 days ago
-3.8%losing
vs 1 year ago
-6.3%year-over-year
7-day trend
↓falling
Data source: CDEC — California Dept of Water Resources — 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: 2026-08-02.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.540, -121.493 · Open in Google Maps
About Lake Oroville
As of August 2, 2026, Lake Oroville is filled to 69.9% of its total capacity, holding roughly 3,053 hm³ of water out of a maximum 4,367 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 3.8 percentage points, and it is 6.3 points below its level on the same date a year earlier.
Across the readings we hold for Lake Oroville — 1824 data points between August 5, 2021 and August 2, 2026 — the level has ranged from a low of 22.2% (September 30, 2021) to a high of 99.9% (June 20, 2023). On average the reservoir is fullest around May and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 39.540°N, 121.493°W.
Key facts
- Current fill level
- 69.9%
- Water stored
- 3,053 hm³
- Total capacity
- 4,367 hm³
- 7-day change
- ▼ 3.8 pts
- Year-on-year
- ▼ 6.3 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 39.540°N, 121.493°W
- Last updated
- August 2, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 2 Aug 2026 | 69.9% | 3,053 |
| 1 Aug 2026 | 70.5% | 3,077 |
| 31 Jul 2026 | 71.0% | 3,099 |
| 30 Jul 2026 | 71.5% | 3,122 |
| 29 Jul 2026 | 72.0% | 3,145 |
| 28 Jul 2026 | 72.6% | 3,170 |
| 27 Jul 2026 | 73.1% | 3,194 |
| 26 Jul 2026 | 73.7% | 3,217 |
| 25 Jul 2026 | 74.3% | 3,244 |
| 24 Jul 2026 | 74.9% | 3,272 |
| 23 Jul 2026 | 75.5% | 3,296 |
| 22 Jul 2026 | 76.1% | 3,322 |
Frequently asked questions
What is the current water level of Lake Oroville?
As of August 2, 2026, Lake Oroville is at 69.9% of its capacity, holding approximately 3,053 hm³ of water, according to CDEC (CA DWR) data.
Is Lake Oroville reservoir full?
No. As of August 2, 2026, Lake Oroville is within its normal operating range at 69.9% of its capacity, so it is not full.
Is the water level at Lake Oroville rising or falling?
The level at Lake Oroville is falling — it dropped 3.8 percentage points over the latest week on record.
How much water can Lake Oroville hold?
Lake Oroville has a total capacity of 4,367 hm³.
Where is Lake Oroville reservoir located?
Lake Oroville is located in California, United States, within the California basin (coordinates 39.540°N, 121.493°W).
What is Lake Oroville used for?
Lake Oroville is used primarily for multiple purposes, and is managed by CDEC.