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Pay Your Bill


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Your monthly billing invoice will display charges for water and sewer services if applicable. Payment is due upon receipt of your invoice.  A delinquent charge will be assessed if payment is not received by the due date shown on your billing invoice. 

Online Payment System Available

Make paying your monthly bill easy and seamless by setting up automatic payment. Simply register for online bill pay by clicking on the link below.

 Pay Your Bill Online

You will need your account number to register online. If you do not have that readily available, please feel free to call customer service at 760-728-1178 to obtain the information needed.  One-time payments are also allowed in the online website without having to register as a new user in the system.


If you elect to participate in the recurring autopay program online, the amount of your water bill will be automatically deducted from your checking, savings or credit card account five days prior to the due date of the bill.  The monthly water bills are sent to our customers in one of three billing cycles each month.

The due dates for Cycle 1,2, and 3 are the 7th, 14th, and the 21st of each month respectively. Therefore, the dates of the recurring payment will fall on the 2nd, 9th, and 16th of each month to avoid late charges.

Mail Your Payment

Mail your payment to us in the envelope provided or come to the District offices at 3707 Old Highway 395, Fallbrook, CA 92028 during regular business hours from 8 a.m. to 4:30 p.m., Monday through Friday, excluding holidays.

A payment drop box is located outside near the front gate entrance of Rainbow MWD that can be accessed 24 hours a day.  Remember to place your payment with stub in an envelope clearly labeled with your name and account number.  Please do not enclose cash.

Your payment can be automatically withdrawn from your bank account by participating in the Direct Payment Program.  This free service makes it easier to pay your water or sewer bills, eliminates the possibility of late payments and concerns when you take a vacation.  Allow 4-6 weeks for this option to be set up and take effect. Your billing invoice will clearly state when the payment will be deducted from your account.

Direct Payment Program Letter and Agreement.pdf

Phone Payments

Additionally, you can use your personal credit card to make a payment quickly over the telephone or internet connection in conjunction with Paymentus Corp. will assess a $4.50 fee for each $500 increment. You may participate by calling 1-855-824-5682 and following the directions of the automated system. You will be asked to enter your account number.  Credit card payments may also be processed at the secure Paymentus Corp. website:

Contact Rainbow MWD's Customer Service at (760) 728-1178 if you need assistance.