# Koolau Reservoir water level today

Koolau Reservoir was at 1,038.30 ft on October 10, 2026. That is 0.41 ft above the typical level for October 10 — higher than in 9 of 10 past years. Over the past week the lake has been steady.

- Latest reading: 1,038.30 ft at 2026-10-10T21:35:00.000Z
- 7-day change: +0.05 ft
- 30-day change: −1.17 ft
- State: Hawaii
- Source: U.S. Geological Survey — https://waterdata.usgs.gov/monitoring-location/USGS-16206600/

## Last 14 days

| Date | Level (ft) |
|---|---|
| 2026-10-10 | 1,038.31 |
| 2026-10-09 | 1,038.31 |
| 2026-10-08 | 1,038.19 |
| 2026-10-07 | 1,038.07 |
| 2026-10-06 | 1,038.11 |
| 2026-10-05 | 1,038.16 |
| 2026-10-04 | 1,038.20 |
| 2026-10-03 | 1,038.25 |
| 2026-10-02 | 1,038.28 |
| 2026-10-01 | 1,038.29 |
| 2026-09-30 | 1,038.28 |
| 2026-09-29 | 1,038.31 |
| 2026-09-28 | 1,038.37 |
| 2026-09-27 | 1,038.43 |

Page: https://lakelevel.app/koolau-reservoir/ — please cite with a link.