How many drinking water utilities are in Hawaii?

Hawaii has 16 drinking water utilities serving more than 10,000 people listed in this directory.

What does 'people served' mean?

People served refers to the total population that receives water service from the utility. This number represents the estimated number of residents within the utility's service area.

Why are utilities listed by city?

Utilities are listed by their primary city of operation to help users find water services in their local area. Some utilities may serve multiple cities or unincorporated areas within a region.

How can I get more details about a utility?

Click on any utility name or the 'View Profile' button to access the full utility profile page, which includes detailed information, contact details, and compliance data.

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Drinking Water Utilities in Hawaii

Browse utilities serving more than 10,000 people by location and population served.

Utilities listed

Total people served

1,306,871

Largest utility

Honolulu-Windward-Pearl Harbor

631,389 people

Coverage

100%

with population data

Hawaii has 16 drinking water utilities serving more than 10,000 people in this directory. The largest utility by population served is Honolulu-Windward-Pearl Harbor, serving 631,389 people. Utilities are listed with their city location and population served.

People Served:

01,000,000

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Utility Name	City	People Served	Action
Honolulu-Windward-Pearl Harbor	Honolulu	631,389	View Profile
Waipahu-Ewa-Waianae	Honolulu	217,479	View Profile
Wailuku	Wailuku	74,511	View Profile
Joint Base Pearl Harbor-Hickam	Jbpph	65,230	View Profile
Mililani	Honolulu	50,573	View Profile
Hilo	Hilo	39,477	View Profile
Schofield Barracks	Schofield Barracks	37,920	View Profile
Lihue-Kapaa	Lihue	34,854	View Profile
Makawao	Wailuku	29,868	View Profile
North Kona	Hilo	29,581	View Profile
Wahiawa	Honolulu	23,348	View Profile
Lahaina	Wailuku	20,065	View Profile
Marine Corps Base Hawaii	Kaneohe Bay	16,300	View Profile
Kalaheo-Koloa	Lihue	12,660	View Profile
Waikoloa	Waikoloa	12,100	View Profile
Waipio Heights	Honolulu	11,516	View Profile

Showing 1 to 16 of 16 utilities

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Top Drinking Water Utilities in Hawaii by Population Served

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Frequently Asked Questions

Definitions

People served: Total population supplied with water by the utility system.
Drinking water utility: A public water system that provides potable (safe to drink) water to residential and commercial customers through a distribution network.