Howard A Hanson Reservoir Water Level
Washington · updated daily from the U.S. Geological Survey
1158.36 ft
Howard A Hanson Reservoir is current reading available and falling (-1.62 ft in the last 7 days).
Change since yesterday: -0.22 ft
Reading as of 2026-08-15
Where Howard A Hanson Reservoir sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
-0.22 ft
7-day change
-1.62 ft
30-day change
-4.78 ft
1-year change
— ft
Last 30 days
Last 12 months
Howard A Hanson Reservoir records and averages
| Current level | 1158.36 ft |
|---|---|
| Record high | 1167.41 ft (2026-05-18) |
| Record low | 1158.36 ft (2026-08-15) |
| Average of all readings | 1164.46 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Howard A Hanson Reservoir full right now?
As of 2026-08-15, Howard A Hanson Reservoir sits at 1158.36 ft, which is current reading available.Over the past 30 days the level has fallen 4.78 ft.
What is the water level at Howard A Hanson Reservoir today?
The most recent reading is 1158.36 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 Howard A Hanson Reservoir has ever been?
The highest level in our records is 1167.41 ft on 2026-05-18. The lowest is 1158.36 ft on 2026-08-15. Our record covers about 0.3 years of readings.
Why is Howard A Hanson Reservoir low 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. Howard A Hanson Reservoir has fallen 4.78 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Howard A Hanson 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 1167.41 ft and a record low of 1158.36 ft.
Nearby lakes in Washington
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Washington lake levels.