Where does Maui water come from?
If you live in Upcountry Maui, your water is surface water from the streams in East Maui. It's treated and disinfected at one of our three water treatment facilities (Kamole, Piiholo, Olinda) before it's delivered to your home. Customers in Haiku get their water from the Haiku or Kaupakalua wells and/or the Kamole WTF. 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. Hana and Molokai also use groundwater. Lahaina has a mix of surface water and groundwater. The water treatment facilities for West Maui are located above Lahainaluna School and near the Kapalua Airport.

Show All Answers

1. Where does Maui water come from?
2. Is Maui County's drinking water really safe?
3. What causes occasional taste and odor changes in Maui water?
4. Why is chlorine added to the water?
5. Why does my water look milky sometimes?
6. Do I have hard or soft water?
7. What is the pH of my water?
8. How much water does an average residential customer use in a month?
9. Why do we have droughts Upcountry?
10. Where can I get more information about lead in Upcountry residential plumbing and what is the DWS doing about it?
11. I live in Upper Kula. What are chloramines and how can they affect me?
12. I recall receiving notices about the water quality in Upcountry Maui, but I haven't seen one in a long time. What happened to those notices?
13. How do I find out information about wastewater reuse/reclamation (recycled water)?
14. How do I find out more information about wastewater?