Reservoir · California · United States · CDEC
BERRYESSA
84.3% full
Capacity
1,976.38 hm³
Volume stored
1667 hm³
Coordinates
38.513°N, 122.104°W
Last updated
2026-09-21
Current fill
84.3%vs 7 days ago
-0.5%losing
vs 1 year ago
-1.3%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: 2026-09-21.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.513, -122.104 · Open in Google Maps
About BERRYESSA
As of September 21, 2026, BERRYESSA is filled to 84.3% of its total capacity, holding roughly 1,667 hm³ of water out of a maximum 1,976 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.5 pts), and it is 1.3 points below its level on the same date a year earlier.
Across the readings we hold for BERRYESSA — 1824 data points between September 24, 2021 and September 21, 2026 — the level has ranged from a low of 49.3% (November 28, 2022) to a high of 100.3% (February 14, 2025). On average the reservoir is fullest around April and at its lowest around October.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 38.513°N, 122.104°W.
Key facts
- Current fill level
- 84.3%
- Water stored
- 1,667 hm³
- Total capacity
- 1,976 hm³
- 7-day change
- ▼ 0.5 pts
- Year-on-year
- ▼ 1.3 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 38.513°N, 122.104°W
- Last updated
- September 21, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 21 Sep 2026 | 84.3% | 1,667 |
| 20 Sep 2026 | 84.4% | 1,668 |
| 19 Sep 2026 | 84.4% | 1,669 |
| 18 Sep 2026 | 84.5% | 1,670 |
| 17 Sep 2026 | 84.6% | 1,671 |
| 16 Sep 2026 | 84.6% | 1,672 |
| 15 Sep 2026 | 84.7% | 1,674 |
| 14 Sep 2026 | 84.8% | 1,675 |
| 13 Sep 2026 | 84.8% | 1,677 |
| 12 Sep 2026 | 84.9% | 1,678 |
| 11 Sep 2026 | 85.0% | 1,679 |
| 10 Sep 2026 | 85.0% | 1,681 |