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Billing & Payment Information

At Hawaii American Water, providing you with the best customer service possible is our priority. 

In Hawaii we offer the following payment methods:

Pay by Mail
Use the convenient return envelope provided to you with your bill. Detach and enclose the bill stub with your check or money order. Do not send cash.

Automatic Payment
Sign up for Automatic Payment, and your bill will be paid on time, every time, directly from your checking or savings account on the date it is due.
Download the Automatic Payment Form for complete instructions.

Pay by Phone
If you do not have questions about your bill, you can call our toll-free, pay-by-phone number at 855.748.6066.  There is a small fee for this service from our third-party vendor.  Be sure to have your ten-digit account number handy.  This is located on the upper right-hand corner of your bill.

Online Bill Pay
With our new self-service website, MyH2O Online, you can pay your bill online, when it is convenient for you. You can also manage your account and keep track of your history of water use and account activity for up to two years. Commercial customers and any others who are unable to register on the site can pay online by visiting

Pay at a local payment location
For our customers who prefer to pay in person, stop by our local office located at 6700 Kalanianaole Highway, Suite #206 in Honolulu. Our office is open Monday through Friday, 8:00 a.m. to 4:30 p.m. You can also search for additional locations, click here.  Please note this location DOES NOT accept payments by mail.

Understanding Your Bill

The service charge on your bill allows the company to recover a portion of fixed costs necessary to provide customers with access to service. Power, chemicals, maintenance, rent, customer service, and administrative service expenses are examples of these costs.

Today, Hawaii American Water’s residential customers are billed a flat rate. However, the bill for commercial customers is based on the volume of water they consume as measured by a water meter at the service location.

Payment is due upon receipt of the billing statement and is past due 31 days from the billing date. After 37 days, a late fee of .5% will apply. All returned payments will incur a $15.00 surcharge.

For residential customers, your sewer bill is a flat service charge.   For commercial customers, your bill is based on your water consumption.

On your bill, you will see find the following:

  1. Upper portion detaches to return with your payment.
  2. Upper portion shows date billed, date due, and amount due.
  3. For your records, the bottom portion includes:
    • Service address
    • Due date
    • How to reach us
    • Account summary