Imperial Reservoir Water Level
Arizona · updated daily from the U.S. Geological Survey
180.64 ft
Imperial Reservoir is current reading available and rising (+0.26 ft in the last 7 days).
Change since yesterday: +0.13 ft
Reading as of 2026-08-15
Where Imperial Reservoir sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
+0.13 ft
7-day change
+0.26 ft
30-day change
-0.05 ft
1-year change
— ft
Last 30 days
Last 12 months
Imperial Reservoir records and averages
| Current level | 180.64 ft |
|---|---|
| Record high | 180.72 ft (2026-07-27) |
| Record low | 180.07 ft (2026-07-12) |
| Average of all readings | 180.51 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Imperial Reservoir full right now?
As of 2026-08-15, Imperial Reservoir sits at 180.64 ft, which is current reading available.Over the past 30 days the level has fallen 0.05 ft.
What is the water level at Imperial Reservoir today?
The most recent reading is 180.64 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 Imperial Reservoir has ever been?
The highest level in our records is 180.72 ft on 2026-07-27. The lowest is 180.07 ft on 2026-07-12. Our record covers about 0.3 years of readings.
Why is Imperial 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. Imperial Reservoir has fallen 0.05 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Imperial 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 180.72 ft and a record low of 180.07 ft.
Nearby lakes in Arizona
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Arizona lake levels.