Missouri American Water: backflow testing rules

Who must test

• From the January 2015 Cross Connection Control Program regulations. Source.
• Residential customers must have backflow protection when the premises has an auxiliary supply, an underground sprinkler system or a private fire protection system (January 2015 regulations). Source.
• Owner is responsible for annual testing by a Certified Backflow Assembly Tester; the Water Company may require more frequent testing. Source.

Notices and deadlines

• A mailed test notice carries the Customer Confirmation Number (CCN) the tester needs to file. Source.

How the report is filed

• Since Sept 1, 2023 reports go to BSI (Backflow Solutions, Inc.) at www.bsionline.com; BSI support 888-966-6050 or support@backflow.com. The tester needs the customer's CCN. Source.

Tester registration

• Testers must hold a BSI login to enter reports. Source.
• Testers must appear on the Missouri DNR certified tester list with current certification. Source.

Approved testers

• Customers can use the Missouri DNR list or BSI's Find a Testing Company lookup (requires the CCN from the notice). Source.

Program

• Statewide program page; contact 1 (866) 554-2912 or moaw.crossconnection@amwater.com. Source.
• The list includes St. Louis County cities, Jefferson City, Joplin and St. Joseph among others, so this one program applies to those districts. Source.

How to file your backflow test with Missouri American Water

1. Read your notice. A mailed test notice carries the Customer Confirmation Number (CCN) the tester needs to file.Source.
2. Book a tester Missouri American Water accepts. See finding a tester below; book early so there is time to repair a failed assembly.
3. The tester tests the assembly and fills in the test report. A failed assembly is repaired and tested again.
4. The report is filed. Since Sept 1, 2023 reports go to BSI (Backflow Solutions, Inc.) at www.bsionline.com; BSI support 888-966-6050 or support@backflow.com. The tester needs the customer's CCN.Source.
5. Keep a copy and set a reminder for next year. Set a free test-due reminder.

Finding a tester Missouri American Water accepts

Missouri American Water keeps its register of testers in an online lookup on amwater.com. We link it and do not copy it, because it changes as testers register. Open the lookup. The testers on this site hold a state certificate; registration with Missouri American Water is a separate step.

Before you book, ask the tester:

• Are you registered with Missouri American Water?
• Will you file the report in BSI Online for me, and pay or pass on any filing fee?
• When is my report due? The date is on your notice; the tester needs time to test, repair if needed and file.

Other water utilities in Missouri

• Public Water Supply District No. 2 of St. Charles County
• City of St. Peters
• City of Wentzville Water Division
• City of Gladstone
• City of Nixa
• Blue Springs Water Utilities
• City of Liberty Utilities
• City of O'Fallon Utility Services

Read October 6, 2026. Program page: amwater.com.

Backflow testers near Jefferson City

What the badges mean

✓ MO Certified Backflow Tester Verified

A state roster lists at least one certified tester at this business, with a current certificate. The state sets the exam and renewal.

✓ MO Utility-Approved Tester Verified On the city list

The company is on a water utility's own approved list (the second badge names the list). That is the utility's approval, not a state license, and it counts for that utility.

3 certified testers

How many certified testers the roster lists at this business.

★ 4.8 (25 reviews)

The Google rating, shown as Google reports it. It does not change the order.

Order is by our quality score, never by payment. How we verify listings.

All testers near Jefferson City · Missouri roster