Reservoir · California · United States · CDEC
Lake Del Valle
46.2% full
Capacity
95.1 hm³
Volume stored
44 hm³
Coordinates
37.614°N, 121.745°W
Last updated
2026-08-03
Current fill
46.2%vs 7 days ago
+0.9%gaining
vs 1 year ago
-3.0%year-over-year
7-day trend
→stable
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: 2026-08-03.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.614, -121.745 · Open in Google Maps
About Lake Del Valle
As of August 3, 2026, Lake Del Valle is filled to 46.2% of its total capacity, holding roughly 44 hm³ of water out of a maximum 95 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 (+0.9 pts), and it is 3.0 points below its level on the same date a year earlier.
Across the readings we hold for Lake Del Valle — 1824 data points between August 5, 2021 and August 3, 2026 — the level has ranged from a low of 33.2% (December 3, 2024) to a high of 70.0% (January 16, 2023). On average the reservoir is fullest around May and at its lowest around December.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 37.614°N, 121.745°W.
Key facts
- Current fill level
- 46.2%
- Water stored
- 44 hm³
- Total capacity
- 95 hm³
- 7-day change
- ▲ 0.9 pts
- Year-on-year
- ▼ 3.0 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 37.614°N, 121.745°W
- Last updated
- August 3, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 3 Aug 2026 | 46.2% | 44 |
| 2 Aug 2026 | 46.1% | 44 |
| 1 Aug 2026 | 45.9% | 44 |
| 31 Jul 2026 | 45.8% | 44 |
| 30 Jul 2026 | 45.6% | 43 |
| 29 Jul 2026 | 45.5% | 43 |
| 28 Jul 2026 | 45.4% | 43 |
| 27 Jul 2026 | 45.3% | 43 |
| 26 Jul 2026 | 45.3% | 43 |
| 25 Jul 2026 | 45.4% | 43 |
| 24 Jul 2026 | 45.4% | 43 |
| 23 Jul 2026 | 45.4% | 43 |
Frequently asked questions
What is the current water level of Lake Del Valle?
As of August 3, 2026, Lake Del Valle is at 46.2% of its capacity, holding approximately 44 hm³ of water, according to CDEC (CA DWR) data.
Is Lake Del Valle reservoir full?
No. As of August 3, 2026, Lake Del Valle is within its normal operating range at 46.2% of its capacity, so it is not full.
Is the water level at Lake Del Valle rising or falling?
The level at Lake Del Valle has been broadly stable over the latest week on record (+0.9 points).
How much water can Lake Del Valle hold?
Lake Del Valle has a total capacity of 95 hm³.
Where is Lake Del Valle reservoir located?
Lake Del Valle is located in California, United States, within the California basin (coordinates 37.614°N, 121.745°W).
What is Lake Del Valle used for?
Lake Del Valle is used primarily for multiple purposes, and is managed by CDEC.