Lake Sumner Water Level Today
New Mexico · near Fort Sumner, NM · Well below full pool
- Elevation
- 4,233.29 ft
- From full pool
- −27.59 ft
- Percent of pool
- 3.5%
- 24-hour change
- −0.03 ft
- 7-day change
- −0.65 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Lake Sumner
Lake Sumner is 27.59 ft below full pool, at 4,233.29 ft, down 0.03 ft in the last 24 hours. That puts the lake at 3.5 percent of its conservation pool. The top of the flood pool is 50.6 ft higher, at 4,283.88 ft.
Over the last 7 days the level fell 0.65 ft, and over 30 days it fell 4.57 ft. In the 400 days of readings on this page the high was 4,255.81 ft on Feb 21, 2026 and the low was 4,233.25 ft on Sep 21, 2026, a range of 22.56 ft.
The reading is the U.S. Army Corps of Engineers gauge, near Fort Sumner, NM, taken Sep 21, 2026 and referenced to the NAVD88 datum. This page is rebuilt once a day from the agency feed; it is not a live gauge, so during a fast rise or a scheduled release check the USACE page for hourly values.
Lake Sumner pool elevations
| Current elevation | 4,233.29 ft |
|---|---|
| Full pool (top of conservation) | 4,260.88 ft |
| Top of flood pool | 4,283.88 ft |
| Bottom of conservation pool | 4,232.28 ft |
| Top of dam | 4,302.88 ft |
| Inflow | 57 cfs |
| Outflow | 86 cfs |
| 30-day change | −4.57 ft |
| 1-year high | 4,255.81 ft (Feb 21, 2026) |
| 1-year low | 4,233.25 ft (Sep 21, 2026) |
| Vertical datum | NAVD88 |
| Operating agency | U.S. Army Corps of Engineers, SPA district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in New Mexico
- Abiquiu Reservoir 6,200.24 ft, −29.76 ft from full
- Brantley Reservoir 3,241.26 ft, −15.14 ft from full
- Cochiti Lake 5,343.85 ft, −1.62 ft from full
- Conchas Lake 4,177.35 ft, −23.65 ft from full
- Navajo Reservoir 6,010.70 ft, −74.29 ft from full
- Santa Rosa Lake 4,696.22 ft, −80.28 ft from full
Lake Sumner level questions
What is the water level of Lake Sumner today?
Lake Sumner is at 4,233.29 ft as of Sep 21, 2026, −27.59 ft relative to full pool (4,260.88 ft). The 24-hour change is −0.03 ft.
What is full pool at Lake Sumner?
Full pool, the top of the conservation pool, is 4,260.88 ft (NAVD88). Above that, water is stored temporarily in the flood pool up to 4,283.88 ft. The bottom of the conservation pool is 4,232.28 ft.
Is Lake Sumner rising or falling?
Over the last 24 hours the level is −0.03 ft; over 7 days it fell 0.65 ft, and over 30 days it fell 4.57 ft.
Where does this Lake Sumner level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Lake Sumner. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.