How to Find a Certified Backflow Tester Near You
If you've received a notice from your water utility requiring a backflow test, your first question is probably a practical one: where do you find someone qualified to do it? Backflow testing isn't something any plumber or handyman can perform — it requires specific certifications, specialized test equipment, and working knowledge of cross-connection control regulations. The good news is that certified testers are more available than most property owners realize. You just need to know where to look.
A licensed plumber using a differential pressure gauge kit to test a reduced pressure zone backflow preventer mounted on a commercial building exterior
Why Certification Matters
Before searching, it's worth understanding what you're actually looking for. A certified backflow tester has completed state-approved training, passed a written and hands-on exam, and maintains their credential through continuing education. Most states also require testers to carry backflow-specific liability coverage and register with the state water board or health department.
The stakes here are real. An improperly conducted test can go undetected, leaving your water supply vulnerable to contamination. Worse, a report filed by an uncertified tester won't be accepted by your utility — meaning you'll fail to meet compliance requirements even if the device itself is functioning correctly. Always confirm that whoever you hire holds an active, current certification before scheduling.
Start With Your Water Utility
Your water provider is often the fastest path to a qualified tester. Most utilities maintain an approved or registered tester list — a roster of individuals and companies that have met the utility's own requirements, which may be stricter than state minimums. These lists are typically available on the utility's website or by calling the cross-connection control department.
When you call, ask specifically for the backflow compliance or cross-connection control contact. Explain your property type and the kind of assembly you have (if you know it), whether that's a reduced pressure zone device, a double check valve assembly, or something else. The utility representative can often point you toward testers who are familiar with your specific equipment or have a track record of submitting complete, accepted reports.
Use State Certification Databases
Every state that regulates backflow testing maintains some form of certification registry. These databases let you verify that a tester's credential is current and in good standing before you hire them. In California, for example, the State Water Resources Control Board publishes certified backflow tester lists by county. Texas maintains a similar database through the Texas Commission on Environmental Quality.
Search your state's environmental or public health agency website for terms like "backflow tester certification lookup" or "cross-connection control certified tester registry." If the database is hard to find, the American Backflow Prevention Association (ABPA) and American Water Works Association (AWWA) both offer search tools that can help you locate certified professionals in your area.
Online Directories and Trade Associations
Several professional organizations maintain searchable directories of certified backflow testers. The ABPA's member directory is one of the most comprehensive and filters results by location and certification type. The AWWA also connects property owners with certified professionals through its network of local sections.
Specialty directories like FindBackflowTesters.com are built specifically for this purpose, allowing you to search by zip code and find testers who serve your area. These platforms often include verified certification information, customer reviews, and direct contact options — eliminating several steps from the search process.
When using any directory, cross-reference what you find. Confirm the tester's certification number with your state registry before booking. A legitimate tester will always be willing to provide their certification details upfront.
A property manager reviewing backflow test compliance documents at a desk with a laptop showing a tester directory website search results
What to Ask Before You Hire
Once you have a few candidates, a short phone call can tell you a lot. Ask these questions before committing:
Is your certification current, and what state or body issued it? Most certifications require annual or biennial renewal. Ask for the expiration date and credential number so you can verify it independently.
Are you familiar with my type of assembly? RPZ devices, double check valves, and pressure vacuum breakers each have different testing procedures. A tester who primarily works on irrigation systems may have less experience with fire suppression backflow preventers, for example.
Do you file the test report directly with my utility? Many testers handle the paperwork on your behalf and submit results electronically. This is a significant convenience, but confirm it rather than assume.
What happens if my device fails? A test might reveal that your backflow preventer needs repair or replacement. Ask whether the tester also handles repairs, or whether they'll refer you to a repair technician, and get a sense of typical costs.
What is included in the fee? Pricing for a standard test generally ranges from $50 to $150 for a single assembly, depending on device type and your region. Make sure the quoted price includes the inspection, testing, and report filing.
What to Watch Out For
Be cautious of any tester who is reluctant to provide their certification number, offers prices dramatically below market rate, or can't explain the testing process clearly. Legitimate testers use calibrated gauge equipment — typically a differential pressure gauge kit — and follow written protocols. If someone shows up without proper test equipment or offers to "just sign off" on the report without conducting a real test, that's a serious red flag that can expose you to liability and leave your water supply unprotected.
Also confirm that the tester is approved specifically by your water utility, not just state-certified. Some utilities maintain stricter requirements or closed approved-tester lists, and submitting a report from a tester not on their roster can result in a compliance rejection.
Close-up of a backflow preventer test kit differential pressure gauges connected to a brass RPZ assembly valve during an active field test
After the Test
Once the test is complete, you should receive a copy of the test report for your own records. Keep this documentation — utilities may request it during audits, and it serves as proof of compliance if any question arises later. If your device passed, you're done until the next testing cycle. If it failed, act quickly: most utilities allow a 30-day window to repair or replace the assembly before issuing a violation notice.
Finding a certified backflow tester is straightforward once you know where to look. Start with your utility's approved list, verify credentials through your state registry, and ask the right questions before you book. A qualified tester protects your water supply, keeps you in compliance, and gets the job done right the first time.
Sources
U.S. Environmental Protection Agency. Cross-Connection Control Manual. EPA 816-R-03-002. Office of Water. https://www.epa.gov/dwreginfo/cross-connection-control-programs
American Water Works Association. AWWA Manual M14: Recommended Practice for Backflow Prevention and Cross-Connection Control. Denver, CO: AWWA.
California State Water Resources Control Board. Backflow Prevention Program — Certified Tester Information. Division of Drinking Water. https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/Backflow.html