Water Information

Water Operator

Si Environmental, LLC

Si Enviro Office Location:
6420 Reading Road, Rosenberg, TX 77471
Customer Care – (832) 490-1600
24/7 Emergency Repair – (832) 490-1601
Email: customercare@sienv.com

Remittance Address:
Harris County MUD 412
PO Box 4824, Houston, TX 77210-4824

If you have any questions regarding your service or billing, please feel free to call: (832) 490-1600 (Local Dialing) or 877-382-7414 (Toll Free).

If you have an emergency to report, such as:

  • Water Leak
  • Loss of Pressure
  • Service Interruption
  • Water Main Break in your Area
  • Sanitary Sewer Stoppage
  • Public Health Hazard

Please call Si Environmental immediately at: (832) 490-1601(Local) or 877-382-7416 (Toll Free).

Welcome Packet
How to Read Your Water Bill

Payment Options

  • Pay-By-Phone
    • 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 (Payments sienv.com)
    • 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 (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
    • Visa/MasterCard/Discover/American Express (3% Convenience Fee*)
    • Electronic Check ($1.00 transaction fee*)
      • Posts automatically to account on due date
  • Online Bill-Pay (through your banking institution)
    • Please be sure to include your complete 10-digit account number when setting up Online Bill-Pay through your banking institution.
    • 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:
        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)
    • Remittance address:
      PO Box 4824, Houston, TX 77210-4824
    • All payments received are processed immediately upon receipt by Si Environmental, LLC.
  • Operator’s Drop Box
    • 6420 Reading Road, Rosenberg TX 77471
      • NO CASH ACCEPTED (Cashier’s or Personal Checks and Money Orders only)
      • All payments received are processed immediately upon receipt by Si Environmental, LLC.

* These charges are third party transaction charges that are not associated or collected by your Municipal Utility District or Si Environmental, LLC.

Lakeshore Residents You’re Invited!

To receive email and text alerts regarding water or sewer emergencies text the message MUD412 to (832) 669-4596