Reservoir · California · United States · CDEC
TULLOCH
81.0% full
Capacity
82.64 hm³
Volume stored
67 hm³
Vs month average
94% of normal
Coordinates
37.875°N, 120.603°W
Last updated
2026-10-14
Current fill
81.0%vs 7 days ago
-4.7%losing
vs 1 year ago
-8.4%year-over-year
7-day trend
↓falling
Drought context
Storage vs October average
94%of normal
81.0% full on 2026-10-14, against an average of 86.6% for October across 6 years of readings (-5.6 points).
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: 2026-10-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.875, -120.603 · Open in Google Maps
About TULLOCH
As of October 14, 2026, TULLOCH is filled to 81.0% of its total capacity, holding roughly 67 hm³ of water out of a maximum 83 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 4.7 percentage points, and it is 8.4 points below its level on the same date a year earlier.
Across the readings we hold for TULLOCH — 1825 data points between October 16, 2021 and October 14, 2026 — the level has ranged from a low of 46.6% (December 10, 2023) to a high of 99.1% (September 4, 2023). On average the reservoir is fullest around July and at its lowest around December.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 37.875°N, 120.603°W.
Key facts
- Current fill level
- 81.0%
- Water stored
- 67 hm³
- Total capacity
- 83 hm³
- 7-day change
- ▼ 4.7 pts
- Year-on-year
- ▼ 8.4 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 37.875°N, 120.603°W
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 81.0% | 67 |
| 13 Oct 2026 | 81.8% | 68 |
| 12 Oct 2026 | 83.2% | 69 |
| 11 Oct 2026 | 83.6% | 69 |
| 10 Oct 2026 | 84.4% | 70 |
| 9 Oct 2026 | 84.5% | 70 |
| 8 Oct 2026 | 85.4% | 71 |
| 7 Oct 2026 | 85.7% | 71 |
| 6 Oct 2026 | 88.0% | 73 |
| 5 Oct 2026 | 87.5% | 72 |
| 4 Oct 2026 | 87.5% | 72 |
| 3 Oct 2026 | 87.3% | 72 |