Hawaii Water Utilities
Comprehensive directory of 41 water utilities serving 1.2 million people across Hawaii. View quality reports, EPA violations, and contact information.
All Water Utilities in Hawaii
Need Hawaii Contact Data?
Get verified contacts for 41 Hawaii water utilities. Names, titles, phone numbers, and emails.
HNL-WINDWARD-PEARL HARBOR
WAILUKU
JOINT BASE PEARL HARBOR-HICKAM
WAIPAHU WATER SYSTEM
MILILANI WATER SYSTEM
HILO
MAKAWAO
KAILUA-KONA WATER SYSTEM
NORTH KONA
LAHAINA
MARINE CORPS BASE HAWAII
WAIKOLOA
WAIPIO HEIGHTS
SOUTH KOHALA
KAANAPALI
UPPER KULA
FORT SHAFTER
OLAA-MOUNTAIN VIEW
ALIAMANU
KAUMAKANI WATER SYSTEM
TRIPLER ARMY MEDICAL CNTR
EWA GENTRY WATER SYSTEM
NORTH KOHALA
HAINA
KAUNAKAKAI
HAWAIIAN BEACHES
LANAI CITY
PAPAIKOU
LALAMILO
PAHOA
PEPEEKEO
HAWAIIAN SHORES
KOHALA RANCH WATER CO.
KAWELA PLANTATION
KUALAPUU
KULANI CORRECTIONAL FACILITY
KAHAKULOA WATER CO.
NAHIKU
KAILUA
PEPEEKEO WATER ASSOCIATION
MAUI HIGHLANDS
Water operators in Hawaii
If you run a water utility in Hawaii, you're subject to the EPA CCR Rule (40 CFR 141.151) enforced by the state drinking-water program. The 2027 revised rule adds direct-URL delivery requirements effective January 1, 2027, with the first compliant report due July 1, 2027. See our 2027 CCR Rule summary for requirements that apply to your utility.
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