Reservoir · California · United States · CDEC
PROSSER CREEK RESERVOIR
36.7% full
Capacity
36.81 hm³
Volume stored
14 hm³
Vs month average
87% of normal
Coordinates
39.379°N, 120.137°W
Last updated
2026-10-31
Current fill
36.7%vs 7 days ago
-3.2 pplosing
vs 1 year ago
-0.6 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
87%of normal
36.7% full on 2026-10-31, against an average of 42.1% for October across 5 years of readings (-5.4 points).
Drought Monitor at this site · 27 October 2026
D1moderate drought
The ground at PROSSER CREEK RESERVOIR's coordinates falls inside the D1 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. California drought figures →
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: 2026-10-31.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.379°N, 120.137°W · Open in Google Maps
About PROSSER CREEK RESERVOIR
As of October 31, 2026, PROSSER CREEK RESERVOIR is filled to 36.7% of its total capacity, holding 13.52 hm³ of water out of a maximum 36.81 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 3.2 percentage points, and it sits close to where it was a year earlier.
Across the readings we hold for PROSSER CREEK RESERVOIR — 1821 data points between November 3, 2021 and October 31, 2026 — the level has ranged from a low of 10.8% (January 24, 2025) to a high of 103.3% (July 12, 2023). On average the reservoir is fullest around July and at its lowest around February.
It is operated by CDEC primarily for multiple purposes. It is at 39.379°N, 120.137°W.
Key facts
- Current fill level
- 36.7% of total capacity
- Water stored
- 13.52 hm³
- Total capacity
- 36.81 hm³
- 7-day change
- ▼ 3.2 pp
- Year-on-year
- ▼ 0.6 pp
- Primary use
- Multipurpose
- Operator
- CDEC
- Coordinates
- 39.379°N, 120.137°W
- Last updated
- October 31, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 31 Oct 2026 | 36.7% | 13.52 |
| 30 Oct 2026 | 37.1% | 13.64 |
| 29 Oct 2026 | 37.5% | 13.81 |
| 28 Oct 2026 | 38.4% | 14.15 |
| 27 Oct 2026 | 38.4% | 14.15 |
| 26 Oct 2026 | 38.9% | 14.32 |
| 25 Oct 2026 | 39.4% | 14.49 |
| 24 Oct 2026 | 39.9% | 14.67 |
| 23 Oct 2026 | 40.3% | 14.84 |
| 22 Oct 2026 | 40.8% | 15.01 |
| 21 Oct 2026 | 41.2% | 15.18 |
| 20 Oct 2026 | 41.6% | 15.33 |