Department of Water Supply

Our Mission


The Department of Water Supply is an agency of the County of Maui. Our mission is to provide clean water efficiently. We provide water to approximately 35,700 services on Maui and Molokai. The water we provide meets all state and federal water quality standards. Take a look around our site to learn more. The Department needs your help! Please conserve water. For easy ways to use less water (and save money), see our tips on Water Conservation.

What's New:


The Department of Water Supply is now accepting watershed protection grant proposals for Fiscal Year 2018. Proposal deadline is August 29, 2016.
View your Water Bill Information
Customers can view their water bills, access account information and request electronic bill presentment online by creating an account here:
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Telephone & Online Payment
You may pay your water bill on-line by using the links below or by telephone at the toll free number posted below.
* Please have available your 10 digit water account number to make a payment.

Residential Commercial Payment by Phone
Online Bill Pay Commercial Online Bill Payment Pay by Phone 855-385-4836
855-385-4836

Commercial Payments Residential Payment
  1. WATER CONSERVATION REQUEST CONTINUES AND EXPANDS

    The request to conserve water is in effect for Wailuku, Kahului, Kihei, Wailea, Makena, Maalaea, and Paia Read on...
  2. WATER CONSERVATION REQUEST CONTINUES; WATER RESTRICTION LIFTED FOR IAO VALLEY AND MAIN STREET

    The Department of Water Supply has cancelled water restrictions for consumers in Iao Valley and on Main Street who were previously given notice of the water restriction. The request to conserve water remains in effect for Wailuku, Kahului and Lahaina. Read on...
  3. 55th Annual HWWA and 1st Annual HRWA Joint Conference & Expo

    Registration is now open for the 55th Annual Hawaii Water Works Association and 1st Annual Hawaii Rural Water Association Joint Conference and Exposition Read on...
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