Reservoir · California · United States · CDEC
Success Lake
21.2% full
Capacity
119.01 hm³
Volume stored
25 hm³
Coordinates
36.057°N, 118.924°W
Last updated
2026-08-03
Current fill
21.2%vs 7 days ago
-2.2%losing
vs 1 year ago
-2.7%year-over-year
7-day trend
↓falling
Data source: CDEC — California Dept of Water Resources — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. 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. 36.057, -118.924 · Open in Google Maps
About Success Lake
As of August 3, 2026, Success Lake is filled to 21.2% of its total capacity, holding roughly 25 hm³ of water out of a maximum 119 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 2.2 percentage points, and it is 2.7 points below its level on the same date a year earlier.
Across the readings we hold for Success Lake — 1823 data points between August 5, 2021 and August 3, 2026 — the level has ranged from a low of 5.1% (October 23, 2022) to a high of 100.0% (March 15, 2023). On average the reservoir is fullest around June and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 36.057°N, 118.924°W.
Key facts
- Current fill level
- 21.2%
- Water stored
- 25 hm³
- Total capacity
- 119 hm³
- 7-day change
- ▼ 2.2 pts
- Year-on-year
- ▼ 2.7 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 36.057°N, 118.924°W
- Last updated
- August 3, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 3 Aug 2026 | 21.2% | 25 |
| 2 Aug 2026 | 21.4% | 25 |
| 1 Aug 2026 | 21.7% | 26 |
| 31 Jul 2026 | 22.1% | 26 |
| 30 Jul 2026 | 22.4% | 27 |
| 29 Jul 2026 | 22.8% | 27 |
| 28 Jul 2026 | 23.1% | 28 |
| 27 Jul 2026 | 23.4% | 28 |
| 26 Jul 2026 | 24.0% | 29 |
| 25 Jul 2026 | 25.0% | 30 |
| 24 Jul 2026 | 26.0% | 31 |
| 23 Jul 2026 | 27.0% | 32 |
Frequently asked questions
What is the current water level of Success Lake?
As of August 3, 2026, Success Lake is at 21.2% of its capacity, holding approximately 25 hm³ of water, according to CDEC (CA DWR) data.
Is Success Lake reservoir full?
No. As of August 3, 2026, Success Lake is low at 21.2% of its capacity, so it is not full.
Is the water level at Success Lake rising or falling?
The level at Success Lake is falling — it dropped 2.2 percentage points over the latest week on record.
How much water can Success Lake hold?
Success Lake has a total capacity of 119 hm³.
Where is Success Lake reservoir located?
Success Lake is located in California, United States, within the California basin (coordinates 36.057°N, 118.924°W).
What is Success Lake used for?
Success Lake is used primarily for multiple purposes, and is managed by CDEC.