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Employer directory · Hawaii

Public water systems in Hawaii

34 public water systems in Hawaii, 39th among the states. Community drinking-water systems owned by a local, state or federal government and serving 3,301 people or more, from EPA's Safe Drinking Water Information System. Private and tribal systems are not included.

Public water systemPopulation served
HNL-WINDWARD-PEARL HARBOR631,389
WAIPAHU-EWA-WAIANAE217,479
WAILUKU74,511
JOINT BASE PEARL HARBOR-HICKAM65,230
MILILANI50,573
HILO39,477
SCHOFIELD BARRACKS37,920
LIHUE-KAPAA34,854
MAKAWAO29,868
NORTH KONA29,581
WAHIAWA23,348
LAHAINA20,065
MARINE CORPS BASE HAWAII16,300
KALAHEO-KOLOA12,660
WAIPIO HEIGHTS11,516
WAIALUA-HALEIWA9,996
SOUTH KOHALA9,612
UPPER KULA7,686
FORT SHAFTER7,067
SOUTH KONA6,512
NCTAMS EASTPAC6,470
OLAA-MOUNTAIN VIEW6,467
ALIAMANU6,406
KEKAHA-WAIMEA5,998
HANAPEPE-ELEELE5,592
TRIPLER ARMY MEDICAL CNTR5,555
BARBERS POINT5,256
NORTH KOHALA4,933
WAIALEE-SUNSET BEACH4,916
HAINA4,563
HAWAII VOLCANOES NAT.PARK4,201
KAUNAKAKAI3,702
LOWER KULA3,522
KILAUEA3,420

Largest first by population served, as each employer reports it to its federal registry.

Source: U.S. Environmental Protection Agency, Safe Drinking Water Information System (SDWIS/Fed), community water systems. Data captured October 2, 2026.

Jobs at public water systems

Water / Wastewater Treatment Operator

More public employers

Other employers in Hawaii

Fire departmentsTransit agenciesSchool districtsPolice departmentsCommunity collegesPublic universitiesPublic libraries

Public water systems in other states

Texas · 1,133California · 523Illinois · 408Alabama · 294Florida · 286Michigan · 284Tennessee · 276New York · 266Pennsylvania · 259Massachusetts · 254Ohio · 243Georgia · 242North Carolina · 237Washington · 211New Jersey · 205Missouri · 200Kentucky · 190Louisiana · 190Minnesota · 185Wisconsin · 185Indiana · 176Colorado · 167Arkansas · 157South Carolina · 143Oklahoma · 142Virginia · 142Utah · 116Iowa · 112Oregon · 111Mississippi · 107Kansas · 88West Virginia · 82Maryland · 69Arizona · 63New Mexico · 53Idaho · 43Nebraska · 43New Hampshire · 38Montana · 32Vermont · 32Maine · 31South Dakota · 31Connecticut · 30Nevada · 28Wyoming · 28Rhode Island · 26Delaware · 20North Dakota · 18Alaska · 16District of Columbia · 3

All public water systems in the U.S. · Hawaii government jobs