Water Payment Options
Make payments online Click Here
Visa/MasterCard/Discover/AMEX (3% Convenience Fee*) – Will post next business day
Electronic Check ($1.00 transaction fee*) - Will post within 2-3 business daysPaperless 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 (3% Convenience Fee*) – Will post next business dayAutomatic Monthly Payments
Login online or contact First Billing at 855-270-3592 to signup for auto payments. You can select your payment method, pick your date, and payment amount. Each month you will receive emails confirming the payment was successful.
Visa/MasterCard/Discover/AMEX (3% Convenience Fee*)
Electronic Check ($1.00 Per Transaction*)
Pay by Phone
Make payments through Pay-By-Phone by dialing 888-944-2578.
You will need your Customer Account Number and payment information.
Visa/MasterCard/Discover/AMEX (3% Convenience Fee*) – Will post next business day
Electronic Check ($1.00 transaction fee*) - Will post within 2-3 business days
Text and Pay using your mobile device
Register your account via the online portal to sign up for Text and Pay.
All Walmart stores internationally
Standard processing (delivered in 3 business days) - $.88*
Next Day processing (delivered next business day) - $1.88*
Western Union Quickpay locations (various HEB, Kroger and Fiesta stores)
$1.50 Transaction Fee* - Will post within 2-3 business days
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
6420 Reading RoadRosenberg TX 77471
Questions About your Bill
Contact Si Environmental
832-490-1600 (local dialing)
1-877-382-7414 (toll free)
* These charges are third party transaction charges that are not associated or collected by Si Environmental, LLC. or your water utility district.
** 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.
Latest News
Only Rain Down the Drain!
Posted: Apr 16, 2021 4:38pm
The U.S. Environmental Protection Agency (EPA) lists pet waste as a significant source of non-point pollution. Pet waste left on lawns, curbs, sidewalks, and streets can wash into local waterways during a rainstorm. Remember, stormwater currently receives no treatment. Water that flows into your stormwater drainage system goes directly into our bayous, rivers, and bays.
Please pick up after your pet!
View PostWater Service Update
Posted: Feb 17, 2021 3:13pm
As of 12 noon 2/17/2021 – Cimarron MUD customers do not need to boil water at this time. Cimarron MUD is NOT included in the City of Houston Boil water notice. We have had a decrease in water pressure due to operations at this time – but there is no need to boil water
Smoke Alarm Blitz (with Photos)
Posted: Nov 19, 2019 5:52pm
Harris County ESD 48 in partnership with the American Red Cross and Cimarron MUD plan to conduct additional smoke alarm blitz' in targeted subdivisions throughout Cimarron MUD for the next two years. Remember to replace smoke and carbon monoxide alarms older than 10 years. The manufacture date is typically printed on the back of the alarm.
View Post