Backflow Prevention

Southwest Regional Water District (SWRWD) works hard to ensure that the drinking water delivered to your home or business is safe at all times. One way we do this is by regulating backflow, or potential cross contamination between drinking water pipes and sources of contamination throughout commercial and industrial customers within the service area.

Backflow occurs when water pressure drops and water is pulled into your plumbing from an unprotected cross connection in your home or business. Common examples of cross connections include lawn irrigation, fire sprinkler systems, and garden hoses submerged in water.

To prevent backflow and possible contaminations, SWRWD requires a reduced pressure backflow prevention assembly on each water line entering a non-residential, commercial, or industrial facility. Double-check backflow preventions assemblies are required on fire lines.

State law requires testing of backflow prevention devices when they are installed and every 12 months thereafter. The water customer is responsible for having these devices installed, tested, and replaced by a plumber with backflow certification. There is a $25.00 administrative fee for each device tested prior to or on the due date. The fee for a late test is $35.00. ALL FEES ARE APPLIED TO THE CUSTOMER'S WATER BILL. THE PLUMBERS WILL NOT NEED TO SUBMIT PAYMENT.

Plumbers are required to submit the results of these tests to SWRWD through Backflow Solutions Inc. (BSI). SWRWD contracts with Backflow Solutions Inc. (BSI) to track all of the backflow testing data from our customers to ensure that the owners have a properly working backflow device on their property.

Water Customer Contact Information:
  • Phone: 888-966-6050
  • Email:
  • Fax: 888-414-4990
  • Mail: PO Box 246, Worth, IL 60482
Additionally, customers can find information regarding their device through the Customer Portal.

Testing Company/Tester Contact Information:
  • Phone: 800-414-4990
  • Email:
  • Fax: 888-414-4990
  • Mail: PO Box 246, Worth, IL 60482
Testers and/or Testing Companies must submit their test results through BSI Online.

To report a suspected Cross-connection please call 513-863-0828.

For updated SWRWD Backflow rules and regulations - Prohibition of Cross-Connections.