Online Payments & Payment Locations

Pay by Mail, Phone, Online, or in Person

There are four ways to pay your bill with Monterey One Water — previously MRWPCA: Monterey Regional Water Pollution Control Agency.

Pay by Mail

P O Box 980970, West Sacramento, CA 95798-0970

Pay by Phone

Call (866) 514-6814.

Charge your bank account or your credit card. (A small convenience fee applies when using these services.)

Make a One-time Payment Online

Visit our secure AFTS payment processing portal.

Pay your M1W bill by phone or online

In-person Payment Locations


Monterey One Water Administrative Offices, 5 Harris Court, Bldg. D


Mal's Market, 1264 Noche Buena St

We're Here to Help

7:30 a.m. to 5:30 p.m., Monday through Friday

(831) 372-3367 or (831) 422-1001

Manage your account online, including e-Billing, using our secure customer portal:
Customer Account Log In

To make a one-time payment, visit the secure online payment portal:
Make a One-time Payment

Administrative Offices