Where does Maui get its drinking water?

For Central Maui (Kahului, Wailuku, Waihee, Maalaea, Kihei, and Paia) your water is groundwater from the Iao Aquifer under the West Maui Mountains. That water is naturally filtered by lava rocks, disinfected, and sent to your home. A small amount of filtered surface water is added to the Central System at the Iao WTF.



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Maui generally enjoys some of the best water quality on earth. Sometimes during winter storms on Maui, Molokai and Lanai water quality can be compromised temporarily by water runoff that carries excessive sediment, nutrients, and pollution called Brown Water Events, characterized by brown-looking water.

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Since the County of Maui does not have sufficient storage and distribution capability to utilize all of the reclaimed wastewater produced on our islands, the excess is sent to the injection wells. The County of Maui wastewater treatment plants and injection wells reduce the impact of human waste on the environment.

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Originating atop the volcano as rain and snowmelt – the water slowly filters through thousands of feet of porous, volcanic rock, re-emerging at the surface as refreshingly crisp, naturally alkaline water.

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Don't enter the water at dawn, dusk or night when sharks are most active and/or moving closer to shore to find food.

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There's plenty of gorgeous water to be found at Maui's beach parks, but the clearest is in Honolua Bay, especially during the summer. Honolua is Hawaiian for “two harbors,” and the bay was originally used to receive ships and unload supplies.

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The sky is blue due to a phenomenon known as Rayleigh scattering of light. This process occurs when white light from the Sun interacts with molecules of oxygen and nitrogen in the atmosphere.

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If amenities, urban life, and spectacular surf are your preferences, you may like Oahu. If you like rural living but also might enjoy some amenities and tourists along with beautiful landscapes, Maui may be your place. And if you want wide-open spaces and have an adventurous spirit, you may prefer the Big Island.

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THE BIG ISLAND'S MOST POPULAR Home to the Kohala Resort Area, the sunny Kohala Coast gets an average of just 10 inches of rainfall per year, making it the most popular part of the Island for vacationers! This area has the highest number of sunny days in the entire state of Hawaii!

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In other words, no place on Maui has volcanic hazards equivalent to Lava-Flow Hazard Zones 1 and 2 on Hawai'i Island.

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