City of Liberty Utilities: backflow testing rules

Notices and deadlines

• Letters give each customer their test date. Source.

How the report is filed

• Mail to Utilities Department, Attn: Backflow Prevention, 101 E. Kansas, Liberty, MO 64068, or email backflow@libertymo.gov. Source.

Approved testers

• City points to the Missouri DNR list. Source.

Program

• City of Liberty backflow prevention FAQ page. Source.

How to file your backflow test with City of Liberty Utilities

1. Read your notice. Letters give each customer their test date.Source.
2. Book a tester City of Liberty Utilities 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. Mail to Utilities Department, Attn: Backflow Prevention, 101 E. Kansas, Liberty, MO 64068, or email backflow@libertymo.gov.Source.
5. Keep a copy and set a reminder for next year. Set a free test-due reminder.

Finding a tester City of Liberty Utilities accepts

City of Liberty Utilities posts a list of testers it accepts on libertymissouri.gov. Open the list. The testers on this site hold a state certificate; check the list or ask the tester whether City of Liberty Utilities accepts them.

Before you book, ask the tester:

• Are you registered with City of Liberty Utilities?
• Will you send the test report to the utility for me, and how?
• 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 O'Fallon Utility Services
• City of St. Charles Water

Read October 6, 2026. Program page: libertymissouri.gov.

Backflow testers near Liberty

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 Liberty · Missouri roster