Hawaii

Hawaii drinking water quality

Every public water system in Hawaii we've verified. Each report covers one calendar year and shows the utility's own measured contaminant levels against federal limits.

Want the national picture? See where Hawaii lands in our ranking of the states with the most open health-based water violations, pulled from the EPA's own records for every U.S. public water system.

131 water systems mapped in Hawaii

Browse all 131 systems A–Z:1

• Hilo (2022)
  1 contaminants measured
• Laupahoehoe-kapehu (2022)
  1 contaminants measured
• Ninole (2022)
  1 contaminants measured
• Ookala (dws) (2021)
  1 contaminants measured
• Honomu (2023)
  1 contaminants measured
• Pepeekeo (2023)
  1 contaminants measured
• Papaikou (2023)
  1 contaminants measured
• Waiohinu-naalehu (2022)
  1 contaminants measured
• Pahala (2021)
  1 contaminants measured
• Kalapana (2022)
  1 contaminants measured
• Pahoa (2022)
  1 contaminants measured
• Olaa-mountain View (2022)
  1 contaminants measured
• Punalu'u (2021)
  1 contaminants measured
• Hawaiian Beaches (2022)
  1 contaminants measured
• North Kohala (2021)
  1 contaminants measured
• South Kohala (2022)
  1 contaminants measured
• North Kona (2021)
  1 contaminants measured
• South Kona (2022)
  1 contaminants measured
• Kukuihaele (2021)
  1 contaminants measured
• Paauilo (2023)
  1 contaminants measured
• Waikoloa (2021)
  1 contaminants measured
• Niulii (2023)
  1 contaminants measured
• Kilauea Military Camp (2022)
  1 contaminants measured
• Hawaii Volcanoes Nat.park (2021)
  1 contaminants measured
• Napuu Water Inc. (2021)
  1 contaminants measured
• Kohala Ranch Water Co. (2021)
  1 contaminants measured
• Hakalau-wailea (2021)
  1 contaminants measured
• Hawaiian Shores (2021)
  1 contaminants measured
• Lalamilo (2023)
  1 contaminants measured
• Haina (2022)
  1 contaminants measured
• Waiki'i Ranch (2021)
  1 contaminants measured
• Kaupulehu (2022)
  1 contaminants measured
• Kawaihae Unit #1 (2023)
  1 contaminants measured
• Kona Water Service Company (2023)
  1 contaminants measured
• Wood Valley (2022)
  1 contaminants measured
• Pepeekeo Water Association (2023)
  1 contaminants measured
• Keopu Water Association (2023)
  1 contaminants measured
• Hawaiian Ocean View Estates (2021)
  1 contaminants measured
• Hana Water Systems - South (2022)
  1 contaminants measured
• Kailua (2021)
  1 contaminants measured
• Kapalua (2021)
  1 contaminants measured
• Kaanapali (2021)
  1 contaminants measured
• Olowalu (2021)
  1 contaminants measured
• Wailuku (2018)
  1 contaminants measured
• Makawao (2019)
  1 contaminants measured
• Lahaina (2018)
  1 contaminants measured
• Upper Kula (2019)
  1 contaminants measured
• Hana (2020)
  1 contaminants measured
• Honokohau (2019)
  1 contaminants measured
• Keanae (2013)
  1 contaminants measured
• Nahiku (2015)
  1 contaminants measured
• Haleakala National Park (2021)
  1 contaminants measured
• Kualapuu (2021)
  1 contaminants measured
• Hoolehua (2020)
  1 contaminants measured
• Maunaloa-kaluakoi (2021)
  1 contaminants measured
• Ualapue (2020)
  1 contaminants measured
• Kaunakakai (2019)
  1 contaminants measured
• Kalae (2013)
  1 contaminants measured
• Lanai City (2021)
  1 contaminants measured
• Kalaupapa Nhp (2021)
  1 contaminants measured
• Hana Water Systems - North (2022)
  1 contaminants measured
• Kipu (2021)
  1 contaminants measured
• Lower Kula (2020)
  1 contaminants measured
• Kawela Plantation (2022)
  1 contaminants measured
• Kahakuloa Water Co. (2023)
  1 contaminants measured
• Mahanalua Nui Subdivison (2021)
  1 contaminants measured
• West Kuiaha Meadows (2022)
  1 contaminants measured
• Maunaolu Plantation (2022)
  1 contaminants measured
• Kula Nani (2021)
  1 contaminants measured
• Maui Highlands (2023)
  1 contaminants measured
• Consolidated Baseyards (2023)
  1 contaminants measured
• Maui Business Park Phase Ii (2022)
  1 contaminants measured
• Haiku Town Water Association, Inc. (2022)
  1 contaminants measured
• Pulehunui Water Association (2023)
  1 contaminants measured
• Baldwin Ranch Estates (2023)
  1 contaminants measured
• Kunia Village (2021)
  1 contaminants measured
• Hawaii Country Club (2021)
  1 contaminants measured
• Waimano Ridge (2023)
  1 contaminants measured
• Waialua Sugar Pump 2 (2021)
  1 contaminants measured
• The Queen's Medical Center (2021)
  1 contaminants measured
• St Stephen's Diocesan Ctr (2024)
  1 contaminants measured
• Kahuku Air Base (2021)
  1 contaminants measured
• Kamehameha Schools (2021)
  1 contaminants measured
• Mililani Memorial Park (2021)
  1 contaminants measured
• Punahou School (2021)
  1 contaminants measured
• Laie Water Company (2021)
  1 contaminants measured
• Dillingham Ranch (2021)
  1 contaminants measured
• Sheraton Hotels (2021)
  1 contaminants measured
• Hnl-windward-pearl Harbor (2018)
  1 contaminants measured
• Waialua-haleiwa (2018)
  1 contaminants measured
• Wahiawa (2018)
  1 contaminants measured
• Waipio Heights (2018)
  1 contaminants measured
• Waipahu-ewa-waianae (2018)
  1 contaminants measured
• Aliamanu (2021)
  1 contaminants measured
• Dillingham Airfield (2021)
  1 contaminants measured
• Fort Shafter (2022)
  1 contaminants measured
• Schofield Barracks (2022)
  1 contaminants measured
• Tripler Army Medical Cntr (2022)
  1 contaminants measured
• Waiawa Correctional Facility (2021)
  1 contaminants measured
• Camp Stover (2021)
  1 contaminants measured
• Barbers Point (2023)
  1 contaminants measured
• Marine Corps Base Hawaii (2021)
  1 contaminants measured
• Nctams Eastpac (2021)
  1 contaminants measured
• Navmag Lualualei (2022)
  1 contaminants measured
• Joint Base Pearl Harbor-hickam (2023)
  1 contaminants measured
• Kahuku (2015)
  1 contaminants measured
• Waialee-sunset Beach (2018)
  1 contaminants measured
• Mililani (2018)
  1 contaminants measured
• Waiahole (2021)
  1 contaminants measured
• Palehua Solar Observatory (2023)
  1 contaminants measured
• Poamoho (2021)
  1 contaminants measured
• Woodlands at Nuuanu (2021)
  1 contaminants measured
• The Queen's Medical Center West Oahu (2022)
  1 contaminants measured
• Lihue-kapaa (2021)
  1 contaminants measured
• Anahola (2021)
  1 contaminants measured
• Anini (2023)
  1 contaminants measured
• Hanalei (2023)
  1 contaminants measured
• Hanapepe-eleele (2021)
  1 contaminants measured
• Kekaha-waimea (2021)
  1 contaminants measured
• Kilauea (2023)
  1 contaminants measured
• Haena-wainiha (2023)
  1 contaminants measured
• Gay & Robinson (2021)
  1 contaminants measured
• Kahili Mountain Park (2022)
  1 contaminants measured
• Kealia (2022)
  1 contaminants measured
• Kokee State Park (2022)
  1 contaminants measured
• Princeville (2021)
  1 contaminants measured
• Pacific Missile Range Facility (2022)
  1 contaminants measured
• Anahola Farm Lots (2023)
  1 contaminants measured
• Kalaheo-koloa (2021)
  1 contaminants measured
• Moloaa Irrigation Cooperative (2025)
  1 contaminants measured
• Koolau Ranch (2024)
  1 contaminants measured