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Hi3 Water

Hawaii Regulatory Risk

2,063 regulatory events on record for Hawaii, which administers water under public trust doctrine. Events come from EPA enforcement and compliance data, the Superfund and hazardous waste registries, USGS flood and streamflow monitoring and the US Drought Monitor, and are matched to nearby springs, wells and aquifers on their asset pages.

Total alerts
2,063
Critical
13
High
21
Medium
2,017
Low
12
Latest event
Sep 7, 2026

Most recent alerts

  • Weoweopilau Stream at Highway 50 bridge, Kauai, HI — Gage Height 19.1 ft

    high

    USGS monitoring station 16054300 reporting gage height of 19.1 ft. Reading: 2026-09-07T01:15:00. Location: 21.95557097, -159.46108622. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Ka Loko Reservoir near Kilauea, Kauai, HI — Gage Height 20.6 ft

    high

    USGS monitoring station 16094150 reporting gage height of 20.6 ft. Reading: 2026-09-07T00:55:00. Location: 22.17897222, -159.3790556. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Ku Tree Reservoir near Wahiawa, Oahu, HI — Gage Height 17.2 ft

    medium

    USGS monitoring station 16208400 reporting gage height of 17.2 ft. Reading: 2026-09-07T00:55:00. Location: 21.4973611, -157.9807222. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Right Branch Lawai Stream nr Umauma Rd, Kauai, HI — Gage Height 11.9 ft

    low

    USGS monitoring station 16052350 reporting gage height of 11.9 ft. Reading: 2026-09-07T00:55:00. Location: 21.93931667, -159.5048056. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Wahiawa Reservoir at Spillway at Wahiawa, Oahu, HI — Gage Height 70.2 ft

    critical

    USGS monitoring station 16210000 reporting gage height of 70.2 ft. Reading: 2026-09-07T01:35:00. Location: 21.49647222, -158.0497778. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Waiahole Stream above Kamehameha Hwy, Oahu, HI — Gage Height 10.1 ft

    low

    USGS monitoring station 16294100 reporting gage height of 10.1 ft. Reading: 2026-09-07T01:35:00. Location: 21.48202778, -157.8458889. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Upper Helemano Reservoir near Wahiawa, Oahu, HI — Gage Height 42.6 ft

    critical

    USGS monitoring station 213133158014201 reporting gage height of 42.6 ft. Reading: 2026-09-07T01:10:00. Location: 21.52591667, -158.0284167. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Kemoo 5 Reservoir, Oahu, HI — Gage Height 14.0 ft

    medium

    USGS monitoring station 213320158061401 reporting gage height of 14.0 ft. Reading: 2026-09-07T01:00:00. Location: 21.55547222, -158.1039167. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Wailuku River at Iao Valley Road, Maui, HI — Gage Height 10.6 ft

    low

    USGS monitoring station 16605500 reporting gage height of 10.6 ft. Reading: 2026-09-07T01:35:00. Location: 20.88297222, -156.5338333. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Kaneohe Str blw Kamehameha Hwy, Oahu, HI — Gage Height 16.2 ft

    medium

    USGS monitoring station 16274100 reporting gage height of 16.2 ft. Reading: 2026-09-07T01:25:00. Location: 21.41180556, -157.798111. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Kaukonahua Str at Waialua, Oahu, HI — Gage Height 17.4 ft

    medium

    USGS monitoring station 16210500 reporting gage height of 17.4 ft. Reading: 2026-09-07T00:50:00. Location: 21.56530556, -158.120361. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Awini Puali Gulch US of Kohala Ditch, HI — Gage Height 29.6 ft

    critical

    USGS monitoring station 16751500 reporting gage height of 29.6 ft. Reading: 2026-09-07T00:45:00. Location: 20.19207865, -155.74753279. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Hakalau Stream nr alt 1300 ft, HI — Gage Height 18.0 ft

    high

    USGS monitoring station 16717700 reporting gage height of 18.0 ft. Reading: 2026-09-07T00:50:00. Location: 19.8717, -155.1668167. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Helemano 6 Reservoir, Oahu, HI — Gage Height 24.3 ft

    high

    USGS monitoring station 213308158035601 reporting gage height of 24.3 ft. Reading: 2026-09-07T01:40:00. Location: 21.5523611, -158.0655833. Source: USGS National Water Information System.

    Flood warning Sep 7, 2026 Source

  • Helemano 6 Reservoir, Oahu, HI — Gage Height 25.2 ft

    critical

    USGS monitoring station 213308158035601 reporting gage height of 25.2 ft. Reading: 2026-07-16T22:15:00. Location: 21.5523611, -158.0655833. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Wailuku River at Iao Valley Road, Maui, HI — Gage Height 10.5 ft

    low

    USGS monitoring station 16605500 reporting gage height of 10.5 ft. Reading: 2026-07-16T22:20:00. Location: 20.88297222, -156.5338333. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Weoweopilau Stream at Highway 50 bridge, Kauai, HI — Gage Height 19.0 ft

    high

    USGS monitoring station 16054300 reporting gage height of 19.0 ft. Reading: 2026-07-16T22:15:00. Location: 21.95557097, -159.46108622. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Ku Tree Reservoir near Wahiawa, Oahu, HI — Gage Height 17.2 ft

    medium

    USGS monitoring station 16208400 reporting gage height of 17.2 ft. Reading: 2026-07-16T22:35:00. Location: 21.4973611, -157.9807222. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Upper Helemano Reservoir near Wahiawa, Oahu, HI — Gage Height 35.7 ft

    critical

    USGS monitoring station 213133158014201 reporting gage height of 35.7 ft. Reading: 2026-07-16T22:10:00. Location: 21.52591667, -158.0284167. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Hakalau Stream nr alt 1300 ft, HI — Gage Height 16.9 ft

    medium

    USGS monitoring station 16717700 reporting gage height of 16.9 ft. Reading: 2026-07-16T21:50:00. Location: 19.8717, -155.1668167. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Wahiawa Reservoir at Spillway at Wahiawa, Oahu, HI — Gage Height 53.3 ft

    critical

    USGS monitoring station 16210000 reporting gage height of 53.3 ft. Reading: 2026-07-16T22:30:00. Location: 21.49647222, -158.0497778. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Ka Loko Reservoir near Kilauea, Kauai, HI — Gage Height 20.9 ft

    high

    USGS monitoring station 16094150 reporting gage height of 20.9 ft. Reading: 2026-07-16T21:55:00. Location: 22.17897222, -159.3790556. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Right Branch Lawai Stream nr Umauma Rd, Kauai, HI — Gage Height 11.4 ft

    low

    USGS monitoring station 16052350 reporting gage height of 11.4 ft. Reading: 2026-07-16T21:55:00. Location: 21.93931667, -159.5048056. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Kaukonahua Str at Waialua, Oahu, HI — Gage Height 17.0 ft

    medium

    USGS monitoring station 16210500 reporting gage height of 17.0 ft. Reading: 2026-07-16T21:50:00. Location: 21.56530556, -158.120361. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Kaneohe Str blw Kamehameha Hwy, Oahu, HI — Gage Height 15.9 ft

    medium

    USGS monitoring station 16274100 reporting gage height of 15.9 ft. Reading: 2026-07-16T22:25:00. Location: 21.41180556, -157.798111. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Awini Puali Gulch US of Kohala Ditch, HI — Gage Height 29.7 ft

    critical

    USGS monitoring station 16751500 reporting gage height of 29.7 ft. Reading: 2026-07-16T21:45:00. Location: 20.19207865, -155.74753279. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Kemoo 5 Reservoir, Oahu, HI — Gage Height 12.6 ft

    low

    USGS monitoring station 213320158061401 reporting gage height of 12.6 ft. Reading: 2026-07-16T22:00:00. Location: 21.55547222, -158.1039167. Source: USGS National Water Information System.

    Flood warning Jul 17, 2026 Source

  • Kemoo 5 Reservoir, Oahu, HI — Gage Height 12.6 ft

    low

    USGS monitoring station 213320158061401 reporting gage height of 12.6 ft. Reading: 2026-04-09T13:00:00. Location: 21.55547222, -158.1039167. Source: USGS National Water Information System.

    Flood warning Apr 9, 2026 Source

  • Hakalau Stream nr alt 1300 ft, HI — Gage Height 16.5 ft

    medium

    USGS monitoring station 16717700 reporting gage height of 16.5 ft. Reading: 2026-04-09T13:50:00. Location: 19.8717, -155.1668167. Source: USGS National Water Information System.

    Flood warning Apr 9, 2026 Source

  • Helemano 6 Reservoir, Oahu, HI — Gage Height 19.5 ft

    high

    USGS monitoring station 213308158035601 reporting gage height of 19.5 ft. Reading: 2026-04-09T13:30:00. Location: 21.5523611, -158.0655833. Source: USGS National Water Information System.

    Flood warning Apr 9, 2026 Source
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