Reservoir · California · United States · CDEC
MCS
99.8% full
Capacity
10.18 hm³
Volume stored
10 hm³
Coordinates
37.520°N, 120.309°W
Last updated
2026-07-07
Current fill
99.8%vs 7 days ago
+0.2%gaining
vs 1 year ago
+2.3%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: 2026-07-07.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.520, -120.309 · Open in Google Maps
About MCS
As of July 7, 2026, MCS is filled to 99.8% of its total capacity, holding roughly 10 hm³ of water out of a maximum 10 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it is 2.3 points above its level on the same date a year earlier.
Across the readings we hold for MCS — 1810 data points between July 10, 2021 and July 7, 2026 — the level has ranged from a low of 69.7% (December 1, 2025) to a high of 105.0% (July 10, 2021). On average the reservoir is fullest around September and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 37.520°N, 120.309°W.
Key facts
- Current fill level
- 99.8%
- Water stored
- 10 hm³
- Total capacity
- 10 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▲ 2.3 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 37.520°N, 120.309°W
- Last updated
- July 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Jul 2026 | 99.8% | 10 |
| 6 Jul 2026 | 99.6% | 10 |
| 5 Jul 2026 | 101.7% | 10 |
| 4 Jul 2026 | 105.0% | 11 |
| 3 Jul 2026 | 105.0% | 11 |
| 2 Jul 2026 | 103.5% | 11 |
| 1 Jul 2026 | 99.7% | 10 |
| 30 Jun 2026 | 97.2% | 10 |
| 29 Jun 2026 | 99.6% | 10 |
| 28 Jun 2026 | 96.8% | 10 |
| 27 Jun 2026 | 97.2% | 10 |
| 26 Jun 2026 | 101.9% | 10 |
Frequently asked questions
What is the current water level of MCS?
As of July 7, 2026, MCS is at 99.8% of its capacity, holding approximately 10 hm³ of water, according to CDEC (CA DWR) data.
Is MCS reservoir full?
MCS is essentially full, sitting at 99.8% of capacity as of July 7, 2026.
Is the water level at MCS rising or falling?
The level at MCS has been broadly stable over the latest week on record (+0.2 points).
How much water can MCS hold?
MCS has a total capacity of 10 hm³.
Where is MCS reservoir located?
MCS is located in California, United States, within the California basin (coordinates 37.520°N, 120.309°W).
What is MCS used for?
MCS is used primarily for multiple purposes, and is managed by CDEC.