Helemano 6 Reservoir Water Level
Hawaii · updated daily from the U.S. Geological Survey
22.17 ft
Helemano 6 Reservoir is low for this time of year and falling (-2.03 ft in the last 7 days).
Change since yesterday: -1.70 ft
Reading as of 2026-08-14 · higher than 6% of August readings on record
Where Helemano 6 Reservoir sits historically
Today's level compared with every reading in our 5.0-year record for this lake.
Since yesterday
-1.70 ft
7-day change
-2.03 ft
30-day change
-3.32 ft
1-year change
-0.82 ft
Last 30 days
Last 12 months
Full history (5.0 years)
Helemano 6 Reservoir records and averages
| Current level | 22.17 ft |
|---|---|
| Record high | 30.87 ft (2026-03-20) |
| Record low | 19.51 ft (2026-03-23) |
| Average of all readings | 23.04 ft |
| Data span | 5.0 years (1,800 readings) |
Frequently asked questions
Is Helemano 6 Reservoir full right now?
As of 2026-08-14, Helemano 6 Reservoir sits at 22.17 ft, which is low for this time of year.Over the past 30 days the level has fallen 3.32 ft.
What is the water level at Helemano 6 Reservoir today?
The most recent reading is 22.17 ft (2026-08-14), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Helemano 6 Reservoir has ever been?
The highest level in our records is 30.87 ft on 2026-03-20. The lowest is 19.51 ft on 2026-03-23. Our record covers about 5.0 years of readings.
Is Helemano 6 Reservoir low for this time of year?
Compared with every August in our records, the current level is higher than 6% of them — low for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.
Why is Helemano 6 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. Helemano 6 Reservoir has fallen 3.32 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Helemano 6 Reservoir changed over the past year?
The level is -0.82 ft compared with this date last year (22.17 ft today). The full-history chart above covers 5.0 years, with a record high of 30.87 ft and a record low of 19.51 ft.
Nearby lakes in Hawaii
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Hawaii lake levels.