Reservoir · California · United States · CDEC
DEL VALLE
41.6% full
Capacity
95.1 hm³
Volume stored
40 hm³
Coordinates
37.614°N, 121.745°W
Last updated
2026-09-17
Current fill
41.6%vs 7 days ago
-1.3%losing
vs 1 year ago
-7.0%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: 2026-09-17.
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 DEL VALLE
As of September 17, 2026, DEL VALLE is filled to 41.6% of its total capacity, holding roughly 40 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 (-1.3 pts), and it is 7.0 points below its level on the same date a year earlier.
Across the readings we hold for DEL VALLE — 1824 data points between September 19, 2021 and September 17, 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
- 41.6%
- Water stored
- 40 hm³
- Total capacity
- 95 hm³
- 7-day change
- ▼ 1.3 pts
- Year-on-year
- ▼ 7.0 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 37.614°N, 121.745°W
- Last updated
- September 17, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 17 Sep 2026 | 41.6% | 40 |
| 16 Sep 2026 | 41.8% | 40 |
| 15 Sep 2026 | 42.0% | 40 |
| 14 Sep 2026 | 42.1% | 40 |
| 13 Sep 2026 | 42.3% | 40 |
| 12 Sep 2026 | 42.5% | 40 |
| 11 Sep 2026 | 42.7% | 41 |
| 10 Sep 2026 | 42.9% | 41 |
| 9 Sep 2026 | 43.1% | 41 |
| 8 Sep 2026 | 43.3% | 41 |
| 7 Sep 2026 | 43.5% | 41 |
| 6 Sep 2026 | 43.7% | 42 |