Online Bill Pay Options are Live at MDS Water

Dear Customer,

We regret the disruption of the online payment access and the inconvenience it caused.  We thank you for the understanding and patience you have extended.  We are excited to tell you that everything is in place and Brazoria County MUD 21 customers now have the capability to pay online again.  Please visit to view your bills and make payments.

24-Hour Service (report repairs and emergencies): (281) 290-6500

Customer Care & Billing Inquiries: (281) 290-6507

Payments may be made via:

  • Pay online – at
    • MasterCard/VISA
    • Electronic check transactions
    • Automatic recurring payments
    • Text to pay
  • Pay by phone – at 833-560-2597
  • Pay at In-District locations – Kroger, HEB grocery stores and Wal-Marts
  • Pay via your bank – generate the payment with your bank’s bill pay service
  • Pay via mail – US Postal Service (P.O. Box 3150, Houston, TX 77253-3150)
  • Pay at the office – MDS office at 406 W. Grand Parkway S., Suite 260, Katy, TX

Please remember to update your account number and the remittance address to:

P.O. Box 3150, Houston, Texas 77253-3150

Thank you,

Board of Directors

Brazoria County Municipal Utility District No. 21

Change in Operator, Setting up New Water Service, and Payment Options

As you likely already are aware, on December 1, 2022, Brazoria County MUD No. 21 (MUD 21) changed operators. Specifically, MUD 21 retained the services of Municipal District Services, LLC (MDS) to operate the water and wastewater systems and to provide billing services. All services that had been provided by EDP/Inframark will now be provided by MDS.

  • 24-Hour Service (report repairs and emergencies): 281-290-6500
  • Customer Care & Billing: 281-290-6500

For information and requirements for setting up new utility service with MUD 21, please visit:, or contact MDS at (281) 290-6500.

If you mail your payments, be sure to use the window envelopes provided so that the payments will reach the new P.O. Box address for MUD 21. Your water bill will continue to be due on the 13th of each month.

MDS offers many convenient ways to pay your water bill, however there will be an interruption in those payment options during the transition period.  In particular, due to new requirements from MUD 21’s third party payment processing company, online payment options are currently not available. MUD 21 is working diligently with its partners to restore the online options, and we will notify you immediately when the online options are accessible. Below are payment methods that are currently available:

  • Pay via your bank’s bill pay service. Please be sure to use the new account number and remittance address.
  • Mail a paper check with the pay stub and return envelope supplied.
  • Pay at your local grocery store or Walmart. Be sure to take your current water bill to ensure proper processing of your payment.
  • Bring a check or money order to our MDS office location/s. Please note cash is NOT accepted.

Payments are no longer accepted at the EDP/Inframark addresses or via the payment portal.

Municipal District Services payment windows are located at:

  • 406 W. Grand Parkway South, Katy, TX 77494
  • 16758 Telge Road, Suite 260 Cypress, TX 77429

If you are paying your utility bill through your bank’s online bill pay service, be advised you must change the P.O. Box number to P.O. Box 3150, Houston, Texas 77253-3150. Your recent water bills also contained a new account number, which you will need to update on your bank’s bill pay website.

Should you have any questions regarding MUD 21 or its utility services, please visit MDS’ website for MUD 21, at, or contact MDS at (281) 290-6500.

We appreciate your patience through the transition process.