drinking water
Find backflow tester rules by state
See who your state allows to test a backflow prevention assembly, and open the official drinking-water page before you hire. There is no single federal tester license.
EPA explains that states and tribes can take primary enforcement responsibility for public water systems under the Safe Drinking Water Act.
U.S. EPAThere is no federal backflow-tester license. The tester credential is set by the state program or the water utility.
U.S. EPAA backflow test checks whether a prevention assembly still stops reverse flow. It is not the same document as a drinking-water lab report.
U.S. EPAState rules
Backflow tester rules by state
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Before You Hire a Tester
Questions to ask a tester and your water utility before you pay for a backflow assembly test.
- Which credential the utility accepts
- Whether the assembly is on a domestic, irrigation, or fire line
- What a failed test requires next
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Why it matters
The utility accepts the report, or it does not
Building owners often learn about backflow when a letter says the assembly is due. The useful question is not who can buy a gauge. It is whose signature the water system will put in the file.
Some states issue the card themselves. Others require a plumber license plus a named certification. Others publish a list of approved certifying organizations. The state pages describe the split we could verify.
Bring the state page to the call with your utility, then follow the utility's form if it is stricter.
Guides
Plain answers, sourced
What a backflow test is
What a backflow test checks, how cross-connections threaten drinking water, and why the field test belongs to a qualified tester.
Read →Who is allowed to test a backflow assembly
There is no federal backflow-tester license. States certify testers, accept named organizations, or leave the credential to the water supplier.
Read →Why utilities require annual backflow testing
Why mechanical backflow assemblies are retested on a schedule, and why the water supplier, not a federal tester license, sends the notice.
Read →Tester and cross-connection specialist
A backflow assembly tester and a cross-connection specialist do different jobs. States that certify both keep the credentials separate.
Read →How to verify a backflow tester
How to check a backflow tester against the state roster, license lookup, or accepted certifying organization before you hire.
Read →Irrigation and fire-line backflow differences
Why lawn irrigation and fire lines are often regulated differently from a domestic backflow assembly, without installation instructions.
Read →Featured partners