← Hawaii lake levels

Koolau Reservoir Water Level Today

Gage height (not an elevation) 6.97 ft Reported Nov 4, 2026, 1:20 AM HST · U.S. Geological Survey, gauge 16206600 · Provisional data

Koolau Reservoir level history

The chart appears once we have two days of readings. We add one reading a day.

Lakes near Koolau Reservoir

Lake Sonoma 2384 mi · 443.36 ft Lake Mendocino 2386 mi · 724.25 ft Pilarcitos Lake 2388 mi · 676.39 ft San Andreas Lake 2389 mi · 444.13 ft Lower Crystal Springs Reservoir 2391 mi · 272.81 ft Clear Lake 2396 mi · 1,322.47 ft
All Hawaii lake levels

FAQ

What is the Koolau Reservoir water level today?

This gauge reports gage height, not lake elevation: 6.97 ft as of Nov 4, 2026, 1:20 AM HST, reported by the U.S. Geological Survey.

How often is this page updated?

Every 3 hours. The gauge reports several times a day.

Data: U.S. Geological Survey, gauge 16206600 (official page). Provisional data, subject to revision. For information only. Not for navigation or flood safety decisions. Check the official source. LakeLevelHQ is not affiliated with any government agency.

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