Reservoir · California · United States · CDEC
NEW MELONES RESERVOIR
56.8% full
Capacity
3,355.07 hm³
Volume stored
1906 hm³
Coordinates
37.948°N, 120.525°W
Last updated
2026-09-17
Current fill
56.8%vs 7 days ago
-0.3%losing
vs 1 year ago
-3.2%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: 2026-09-17.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.948, -120.525 · Open in Google Maps
About NEW MELONES RESERVOIR
As of September 17, 2026, NEW MELONES RESERVOIR is filled to 56.8% of its total capacity, holding roughly 1,906 hm³ of water out of a maximum 3,355 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.3 pts), and it is 3.2 points below its level on the same date a year earlier.
Across the readings we hold for NEW MELONES RESERVOIR — 1825 data points between September 19, 2021 and September 17, 2026 — the level has ranged from a low of 21.4% (November 1, 2022) to a high of 77.4% (June 7, 2024). On average the reservoir is fullest around June and at its lowest around October.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 37.948°N, 120.525°W.
Key facts
- Current fill level
- 56.8%
- Water stored
- 1,906 hm³
- Total capacity
- 3,355 hm³
- 7-day change
- ▼ 0.3 pts
- Year-on-year
- ▼ 3.2 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 37.948°N, 120.525°W
- Last updated
- September 17, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 17 Sep 2026 | 56.8% | 1,906 |
| 16 Sep 2026 | 56.8% | 1,907 |
| 15 Sep 2026 | 56.9% | 1,907 |
| 14 Sep 2026 | 56.9% | 1,909 |
| 13 Sep 2026 | 56.9% | 1,911 |
| 12 Sep 2026 | 57.0% | 1,912 |
| 11 Sep 2026 | 57.1% | 1,915 |
| 10 Sep 2026 | 57.1% | 1,916 |
| 9 Sep 2026 | 57.1% | 1,916 |
| 8 Sep 2026 | 57.1% | 1,917 |
| 7 Sep 2026 | 57.2% | 1,918 |
| 6 Sep 2026 | 57.2% | 1,918 |