Alto Reservoir Water Level
New Mexico · updated daily from the U.S. Geological Survey
4.33 ft
Alto Reservoir is current reading available and steady (+0.00 ft in the last 7 days).
Change since yesterday: +0.00 ft
Reading as of 2026-08-15
Where Alto Reservoir sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
+0.00 ft
7-day change
+0.00 ft
30-day change
+0.00 ft
1-year change
— ft
Last 30 days
Last 12 months
Alto Reservoir records and averages
| Current level | 4.33 ft |
|---|---|
| Record high | 4.5 ft (2026-07-17) |
| Record low | 4.33 ft (2026-04-17) |
| Average of all readings | 4.33 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Alto Reservoir full right now?
As of 2026-08-15, Alto Reservoir sits at 4.33 ft, which is current reading available.Over the past 30 days the level has held steady 0.00 ft.
What is the water level at Alto Reservoir today?
The most recent reading is 4.33 ft (2026-08-15), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Alto Reservoir has ever been?
The highest level in our records is 4.5 ft on 2026-07-17. The lowest is 4.33 ft on 2026-04-17. Our record covers about 0.3 years of readings.
Why is Alto Reservoir changing right now?
Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Alto Reservoir has held steady 0.00 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Alto Reservoir changed over the past year?
Year-over-year comparison is not available for this lake yet. The full-history chart above covers 0.3 years, with a record high of 4.5 ft and a record low of 4.33 ft.
Nearby lakes in New Mexico
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All New Mexico lake levels.