Water Payment Options
Make Payments Online
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 below and have the option of paying your bill directly from your email by clicking PAY NOW.
Monthly Auto-draft (drafted on due date)
Bank Draft (no convenience fee)
Activation completion indicated by first invoice that states "DO NOT PAY"
Dropbox Payments:
Payments are not accepted at the HCMUD 81 Administration Building. The payment dropbox is at:
6420 Reading Road,
Rosenberg, TX 77471.
Questions About your Bill?
Contact Si Environmental
832-490-1600 (local dialing)
1-877-382-7414 (toll free)
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.
Western Union Quickpay locations (various HEB, Kroger and Fiesta stores)
Convenience fee varies - see store for details.
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)
Pay by Mail
Checks sent via the USPS. This includes online bill-pay through your banking institution.
PO Box 4824
Houston, TX 77210-4824
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)
Drop Box NO CASH ACCEPTED (Cashier's or Personal Checks and Money Orders only)
6420 Reading Road
Rosenberg TX 77471
* 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.