Reservoir · California · United States · CDEC
ANTELOPE LAKE
81.3% full
Capacity
27.83 hm³
Volume stored
23 hm³
Coordinates
40.180°N, 120.607°W
Last updated
2026-09-16
Current fill
81.3%vs 7 days ago
-1.1%losing
vs 1 year ago
+1.4%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: 2026-09-16.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.180, -120.607 · Open in Google Maps
About ANTELOPE LAKE
As of September 16, 2026, ANTELOPE LAKE is filled to 81.3% of its total capacity, holding roughly 23 hm³ of water out of a maximum 28 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-1.1 pts), and it is 1.4 points above its level on the same date a year earlier.
Across the readings we hold for ANTELOPE LAKE — 1823 data points between September 19, 2021 and September 16, 2026 — the level has ranged from a low of 59.3% (October 20, 2021) to a high of 105.0% (April 11, 2023). On average the reservoir is fullest around April and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 40.180°N, 120.607°W.
Key facts
- Current fill level
- 81.3%
- Water stored
- 23 hm³
- Total capacity
- 28 hm³
- 7-day change
- ▼ 1.1 pts
- Year-on-year
- ▲ 1.4 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 40.180°N, 120.607°W
- Last updated
- September 16, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 16 Sep 2026 | 81.3% | 23 |
| 15 Sep 2026 | 81.5% | 23 |
| 14 Sep 2026 | 81.6% | 23 |
| 13 Sep 2026 | 81.8% | 23 |
| 12 Sep 2026 | 82.0% | 23 |
| 11 Sep 2026 | 82.1% | 23 |
| 10 Sep 2026 | 82.3% | 23 |
| 9 Sep 2026 | 82.4% | 23 |
| 8 Sep 2026 | 82.5% | 23 |
| 7 Sep 2026 | 82.7% | 23 |
| 6 Sep 2026 | 82.8% | 23 |
| 5 Sep 2026 | 82.9% | 23 |