Reservoir · New Mexico · United States · BOR RISE
Lake Sumner
Lake Sumner and Dam
20.5% full
Capacity
78.56 hm³
Volume stored
16 hm³
Vs month average
142% of normal
Coordinates
34.629°N, 104.392°W
Last updated
2026-10-26
Current fill
20.5%vs 7 days ago
+7.1 ppgaining
vs 1 year ago
-0.4 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
142%of normal
20.5% full on 2026-10-26, against an average of 14.4% for October across 6 years of readings (+6.1 points).
Drought Monitor at this site · 20 October 2026
D1moderate drought
The ground at Lake Sumner's coordinates falls inside the D1 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. New Mexico drought figures →
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: 2026-10-26.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.629°N, 104.392°W · Open in Google Maps
About Lake Sumner
As of October 26, 2026, Lake Sumner is filled to 20.5% of its total capacity, holding 16.14 hm³ of water out of a maximum 78.56 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has risen by 7.1 percentage points, and it sits close to where it was a year earlier.
Across the readings we hold for Lake Sumner — 1824 data points between October 29, 2021 and October 26, 2026 — the level has ranged from a low of 4.2% (September 21, 2026) to a high of 44.1% (June 8, 2023). On average the reservoir is fullest around February and at its lowest around September.
It is operated by BOR primarily for multiple purposes. It is at 34.629°N, 104.392°W.
Key facts
- Current fill level
- 20.5% of total capacity
- Water stored
- 16.14 hm³
- Total capacity
- 78.56 hm³
- 7-day change
- ▲ 7.1 pp
- Year-on-year
- ▼ 0.4 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 34.629°N, 104.392°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 20.5% | 16.14 |
| 25 Oct 2026 | 17.0% | 13.36 |
| 24 Oct 2026 | 14.0% | 11.02 |
| 23 Oct 2026 | 13.5% | 10.58 |
| 22 Oct 2026 | 13.3% | 10.42 |
| 21 Oct 2026 | 13.2% | 10.4 |
| 20 Oct 2026 | 13.3% | 10.46 |
| 19 Oct 2026 | 13.4% | 10.55 |
| 18 Oct 2026 | 13.6% | 10.66 |
| 17 Oct 2026 | 13.7% | 10.77 |
| 16 Oct 2026 | 13.9% | 10.89 |
| 15 Oct 2026 | 14.0% | 11.03 |