Water Payment Options
Dropbox Payments:
Payments are not accepted at the HCMUD 81 Administration Building. The payment dropbox is at:
6420 Reading Road,Rosenberg, TX 77471.
Make payments online Click Here
Visa/MasterCard/Discover/AMEX (no convenience fee) – Will post next business day
Electronic Check (no convenience fee) - Will post within 2-3 business days
Paperless Billing
Sign up for Paperless Billing via the link above and have the option of paying your bill directly from your email by clicking PAY NOW.
Visa/MasterCard/Discover/AMEX (no convenience fee) – Will post next business day
Monthly Auto-draft (drafted on due date)
Visa/MasterCard/Discover/American Express (no convenience fee)
Bank Draft (no convenience fee)
Activation completion indicated by first invoice that states "DO NOT PAY"
Pay by Phone
Make payments through Pay-By-Phone by dialing 832-490-1600.
You will need your Customer Account Number and payment information.
Visa/MasterCard/Discover/AMEX (no convenience fee) – Will post next business day
Electronic Check (no convenience fee) - Will post within 2-3 business days
All Walmart Locations (Check-Free) Convenience fee varies - see store for details
Standard processing (delivered in 3 business days)
Next Day processing (delivered next business day)
Western Union Quickpay locations (various HEB, Kroger and Fiesta stores)
Convenience fee varies - see store for details
Bill-pay through your banking institution *
Please be sure to include your account number when setting up bill-pay through your banking institution.
(Up to 10 days for processing from the date that the bank issues the payment)
Pay by Mail
Checks sent via the USPS
This includes online bill-pay through your banking institution
Houston, TX 77210-4824
Drop Box NO CASH ACCEPTED (Cashier's or Personal Checks and Money Orders only)
6420 Reading RoadRosenberg TX 77471
Questions About your Bill
Contact Si Environmental
832-490-1600 (local dialing)
1-877-382-7414 (toll free)
* Online Bill-pay through your banking institution generally involves your bank utilizing a third party to create a check that is sent to the address that you specify. Si Environmental, LLC. has no control over the check creation and mailing process for this service. All payments are processed within 24 hours of receipt by Si Environmental, LLC.