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HI tap water quality, city by city

34 cities and towns in HI are served by an active community water system in the EPA's records. Each page below translates that system's EPA-reported history into plain English.

According to EPA SDWIS data, retrieved July 2026.

• Anahola
• Hana
• Hawaii National Park
• Hilo
• Holualoa
• Honolulu
• Jbpph
• Kahuku
• Kahului
• Kailua Kona
• Kalaheo
• Kalaupapa
• Kamuela
• Kaneohe Bay
• Kapalua
• Kaumakani
• Kaunakakai
• Koloa
• Kunia
• Laie
• Lanai City
• Lihue
• Makawao
• Maunaloa
• Pahala
• Pahoa
• Pearl City
• Princeville
• Pukalani
• Puunene
• Schofield Barracks
• Wahiawa
• Waikoloa
• Wailuku