Water and Sewer
5300 Coral Gables Dr.
Houston, TX 77069
In Case of Water/Sewer Emergency,
Si Environmental: (281) 807-9500
The District provides water and sewer service to 935 connections.
The District operates a water supply plant that includes two 400,000 gallon ground water tanks, five distribution pumps, two water wells, and a connection to receive water from the North Harris County Regional Water Authority. A 250,000 gallon elevated water tank provides water pressure in the event of a short power outage. Emergency diesel drives are used to continue water service during longer interruptions in power. The District has interconnect agreements with 3 surrounding Districts to supply or receive water in an emergency.
The District water mains are generally in the street right-of-way. A tap to that line carries water to the water meter located in the front or side yard. The District is responsible for maintenance of the water main, tap, and water meter. The customer is responsible for all water lines beyond the meter.
The sanitary sewer lines are generally along the back property line. However, some business and residential customers have their connection in the front of the property. The sewage flows to a 1.3 million gallon per day capacity Wastewater Treatment Plant managed by the District. The plant serves this District and Heatherloch Municpal Utility District. The districts share in all expenses related to the operation and maintenance of the facility.
Current Customers
Dear Valued Customer,
We are pleased to inform you that our software system upgrade is nearly complete. As part of this transition, your water invoice, starting with the November 2025 statement, will feature a new look and new account number.
After you receive the new invoice statement, you will be able to view your Billing History, Payment History and Pay Your Bill using your credit card (Visa, MasterCard, Discover or American Express) or electronic check. We provide an online experience that is secure and convenient. More details about these new payment options as well as others are enclosed. We invite you to visit our website at www.sienviro.com.
*Please note: Due to the system upgrade, electronic payments will be unavailable for your October 2025 bill due 11/20/2025. During the transition, your available payment options will be:
Option 1: A check or money order made payable to your district brought to one of our offices or mailed to PO BOX 4824 HOUSTON, TX 77210-4824. Please make sure to include the service address or old account number on the check. Option 2: Pay after the upgrade-no late fees. You may wait to pay after the system upgrade, when you receive your November 2025 statement, using your new account number. You’ll be able to pay both October and November bills together. No late fees will apply for the 11/20/25 due bill.
Our goal is to make this transition as smooth as possible and to continue delivering the high level of service you expect from Si Environmental. Enclosed, you will find the Payment Options offered through the new online system along with our regular payment options through local stores, bill pay, mail, and our office drop-off locations, and a guide for How to Read Your New Bill.
If you have any questions or concerns regarding the new invoice format or your account, please don’t hesitate to reach out to our Customer Care team:
Phone: 281-807-9500
Email: cyp.customerservice@sienviro.
Thank you for being a valued customer.
Sincerely, Si Environmental, LLC.
Online Account Instructions
SETTING UP YOUR ONLINE ACCOUNT:
- Go online to www.sienviro.com
- Click the “FIND MY DISTRICT” box at the top of the page.
- In the “Search For Your District” bar type in all or part of your District name and search, or scroll down and click through the pages to find your district box.
*If you are unsure what district your address is in, it can be found on your new account email or at the top left corner of your regular white bill. If you are still having problems finding your district or do not have a copy of your bill available, our customer care number is 281-807-9500. - Once your district box appears, click the “Pay Online” link.
- This will take you to the online customer portal, where you can set up your new online account.
- Click the “Register” link under “Don’t have an account yet?”
- In the “Account Number” box, enter the 15-digit Account Number as it appears on your statement, which can be found at the top right corner of your regular white bill. *If you are having problems finding your Account Number or do not have a copy of your bill available, our customer care number is 281-807-9500.
- Enter the Zip Code corresponding to your Service Address.
- Enter a User Name and Email Address of your choice.
- Enter a Password of your choice and Confirm Password then click the green “Register” button.
- Once you have completed these steps, it will automatically take you to your new online account where you can make payments, set up auto draft, or view your bills.
SETTING UP E-BILL:
- On the Home page, under “Automated Services”, click the “Set up e-Billing” link.
- This will automatically take you to the e-Billing page and pre-fill your email account, just click the blue “Sign Me Up!” button.
- Then your screen should change with an orange sign stating, “Waiting for verification”, you will need to check your email inbox and confirm your e-Billing address.
PAYMENTS:
- You can set up Auto-Pay by clicking the “Auto-Pay” tab and Add a New payment method, Payment Amount, and Payment Date.
- You can also make one-time online payments through your online account. At the top left, you will see a tab that says, “Make Payment”, click this tab.
- Follow the remaining prompts for entering your payment information and pay and confirm.
- Please call customer care with your confirmation number to verify we received your payment or if your water service is turned off, to restore service call 281-807-9500 before 4pm for same-day service.
*For any additional assistance with your online account, making online payments, or setting up Auto-Pay, please contact our third-party payment provider First Billing Services directly at 855-270-3592.
Payment Options
Pay-By-Phone (go to www.sienviro.com, find your district, the number is listed there)
- Visa/MasterCard/Discover/American Express (3% Convenience Fee*)
- Posts next business day
- Electronic Check ($1.00 transaction fee*)
- Posts to account next business day
Online Website (go to www.sienviro.com, find your district, click Pay Online)
- Visa/MasterCard/Discover/American Express (3% Convenience Fee*)
- Posts next business day
- Electronic Check ($1.00 transaction fee*)
- Posts to account next business day
Text to Pay (go to www.sienviro.com, find your district, login online to set up payment via your mobile device)
- Visa/MasterCard/Discover/American Express (3% Convenience Fee*)
- Posts next business day
- Electronic Check ($1.00 transaction fee*)
- Posts to account next business day
Monthly Auto-Draft (go to www.sienviro.com, find your district, login online to set up Auto-Draft)
- Visa/MasterCard/Discover/American Express (3% Convenience Fee*)
- Posts to account on the scheduled draft date
- Electronic Check ($1.00 transaction fee*)
- Posts to account on the scheduled draft date
- Please note: customers who opt to sign up for e-billing and auto draft payments paid via electronic check will have the $1.00 transaction fee waived.
- Posts to account on the scheduled draft date
All Walmart Locations (Check-Free)
- Visa/MasterCard/Discover/American Express (3% Convenience Fee*)
- Posts next business day
- Electronic Check ($1.00 transaction fee*)
- Posts to account next business day
Western Union (QuickPay – various HEB, Kroger and Fiesta stores)
- $1.50 Transaction Fee*
- Posts to account within (2-3) business days
Online Bill-Pay (through your banking institution)
- Please be sure to include your complete 15-digit account number when setting up Online Bill-Pay through your banking institution (ex: 90XXX-XXXXXXXXXX).
- Please be advised that Online Bill-Pay through your banking institution generally involves your bank utilizing a third-party company to create a paper check that is sent to the specified remittance address. Your Municipal Utility District nor Si Environmental, LLC. will have any control over the check creation and the mailing process for this banking institution service.
- Remittance address: HC WCID #116 – PO BOX 4824, Houston, TX 77210-4824
- All payments received are processed within 1 business day of receipt by Si Environmental, LLC.
MUD Lockbox (Checks sent via the United States Postal Service)
- Mailing address: HC WCID #116 – PO BOX 4824, Houston, TX 77210-4824
- All check or money order payments should be made payable to your district: HC WCID #116.
- All payments received are processed within 1 business day of receipt by Si Environmental, LLC.
Operator’s Drop Box Locations:
- 6420 Reading Road, Rosenberg, TX 77471
- 5300 Coral Gables Dr, Houston, TX 77069
- 9431 Rio Grande Dr, Houston, TX 77064
- 9826 Whithorn Dr, Houston, TX 77095
- NO CASH ACCEPTED (Personal Checks, Cashier’s Checks, and Money Orders only)
- All check or money order payments should be made payable to your district: HC WCID #116.
- All payments received are processed within 1 business day of receipt by Si Environmental, LLC.
- NO CASH ACCEPTED (Personal Checks, Cashier’s Checks, and Money Orders only)
How to Read Your Bill
Frequently Asked Questions
Si Environmental, LLC Customer Service Department Information:
Main: 832-490-1600
Fax: 832-490-1501
Website: www.sienv.com
Email: customercare@sienv.com
Customer Service hours of Operation: Monday – Friday 8:00 AM – 5:00 PM CT
Direct all correspondence to:
PO BOX 4824
HOUSTON TX 77210
New Residents
New Residents to HCWCID 116 requesting new water services must complete the application online at: https://www.sienviro.com/my-mud/harris-county-wcid-116/. If you have any questions or concerns, you may contact Si Enviro Customer Care Department at 281-807-9500. Call hours are Monday-Friday from 8:00am to 4:30pm.
Residence types are:
Homeowners
Include copy of your Closing Disclosure, Settlement Statement, Hud-1, HCAD, or current Mortgage statement. *** Newly constructed homes can ONLY be established in the homeowner’s name to start services.
Tenants
Copy of lease agreement; we require the 1st page which includes parties involved, property location, and terms with start/end date of lease, and the signature page showing all parties have signed.
Property Manager
Either a Residential Real Estate Listing Agreement or Residential Leasing and Property Management Agreement showing the owner authorizes the property manager to handle the property on their behalf.
Company/Business
Copy of lease agreement or proof of ownership (see examples above), along with a business card or Letter of Authorization for the person submitting/signing the application on behalf of the business and a W-9, or SS-4 form with the business EIN number.
Smart Meter Usage
As part of the District’s ongoing efforts to improve services to its customers, you now have direct and secure access to your water usage data. HC WCID 116 EyeOnWater suite of available tools includes a secure online website to review and analyze your usage patterns. A consumer smartphone app is also available, and can be downlaoded from the app store.
With these tools, you are now able to view your hourly usage activity and gain greater understanding and control of the amount of water you use. EyeOnWater Online provides easy to understand graphs and the ability to establish alerts–including identifying potential tasks.
To access your personalized online portal, please visit: www.eyeonwater.net/signup. To register for an online account, you will need: Zip code; your billing account number from your water bill, and your e-mail address.