Reservoir · New Mexico · United States · BOR RISE
Lake Sumner and Dam
22.7% full
Capacity
78.56 hm³
Volume stored
18 hm³
Coordinates
34.629°N, 104.392°W
Last updated
2026-07-28
Current fill
22.7%vs 7 days ago
+1.1%gaining
vs 1 year ago
+6.2%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.629, -104.392 · Open in Google Maps
About Lake Sumner and Dam
As of July 28, 2026, Lake Sumner and Dam is filled to 22.7% of its total capacity, holding roughly 18 hm³ of water out of a maximum 79 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (+1.1 pts), and it is 6.2 points above its level on the same date a year earlier.
Across the readings we hold for Lake Sumner and Dam — 1824 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 5.0% (August 8, 2022) to a high of 44.1% (June 8, 2023). On average the reservoir is fullest around February and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the New Mexico basin at 34.629°N, 104.392°W.
Key facts
- Current fill level
- 22.7%
- Water stored
- 18 hm³
- Total capacity
- 79 hm³
- 7-day change
- ▲ 1.1 pts
- Year-on-year
- ▲ 6.2 pts
- Primary use
- Multipurpose
- River basin
- New Mexico
- Operator
- BOR
- Coordinates
- 34.629°N, 104.392°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 22.7% | 18 |
| 27 Jul 2026 | 21.6% | 17 |
| 26 Jul 2026 | 20.5% | 16 |
| 25 Jul 2026 | 19.2% | 15 |
| 24 Jul 2026 | 18.0% | 14 |
| 23 Jul 2026 | 16.8% | 13 |
| 22 Jul 2026 | 14.5% | 11 |
| 21 Jul 2026 | 10.9% | 9 |
| 20 Jul 2026 | 8.9% | 7 |
| 19 Jul 2026 | 9.0% | 7 |
| 18 Jul 2026 | 9.2% | 7 |
| 17 Jul 2026 | 9.3% | 7 |
Frequently asked questions
What is the current water level of Lake Sumner and Dam?
As of July 28, 2026, Lake Sumner and Dam is at 22.7% of its capacity, holding approximately 18 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Sumner and Dam reservoir full?
No. As of July 28, 2026, Lake Sumner and Dam is low at 22.7% of its capacity, so it is not full.
Is the water level at Lake Sumner and Dam rising or falling?
The level at Lake Sumner and Dam has been broadly stable over the latest week on record (+1.1 points).
How much water can Lake Sumner and Dam hold?
Lake Sumner and Dam has a total capacity of 79 hm³.
Where is Lake Sumner and Dam reservoir located?
Lake Sumner and Dam is located in New Mexico, United States, within the New Mexico basin (coordinates 34.629°N, 104.392°W).
What is Lake Sumner and Dam used for?
Lake Sumner and Dam is used primarily for multiple purposes, and is managed by BOR.