Backflow Tester List

State rules

Indiana

Indiana’s cross-connection rules are in 327 IAC 8-10, and the Department of Environmental Management publishes a cross-connection control and backflow prevention manual that reprints those rules. The rule defines a cross-connection control device inspector as a person who has successfully completed training from a commissioner-approved training provider, has received a registration number from the commissioner, and has not been notified that the number was revoked. The customer must have each required device inspected or tested by such an inspector at construction or installation and at the intervals in the rule. IDEM’s manual page lists a central-office telephone of 317-232-8603.

Checked against official sources on October 11, 2026. Rules and links change; confirm with the office listed before you act.

Try a ZIP like 30303, “Travis County” or “Columbus, OH”
Drinking-water agency
The Indiana Department of Environmental Management administers 327 IAC 8-10 cross-connection control and registers device inspectors.
Who may test an assembly
Required devices are inspected or tested by a registered cross-connection control device inspector trained by a commissioner-approved provider.
Official program page
Official page →

Section 8 of the rule says the customer shall have each required device inspected or tested by a cross-connection control device inspector at installation and then on the stated intervals. Air gaps are inspected at intervals not exceeding one year. Reduced-pressure principle backflow preventers, double check valve assemblies, pressure vacuum breakers, and spill-resistant vacuum breakers are tested at intervals not exceeding one year. Atmospheric vacuum breaker backsiphonage prevention assemblies are inspected at intervals not exceeding one year. The customer shall permit access by the inspector, the public water system, or the commissioner at reasonable times upon presentation of identification.

The manual says a backflow inspector or tester completed training from an IDEM-approved provider. Testers complete an IDEM Active-list questionnaire to be listed, or they can verify a registration number on the Indiana Professional Licensing Agency website. The manual says this license does not expire. The date on that website is the year the next Active-list questionnaire is sent. IDEM may revoke or suspend a registration after a hearing for improper testing, maintenance, reporting, or another violation of 327 IAC 8-10.

The manual also says testing equipment must be tested and calibrated annually in accordance with section 10 of the University of Southern California Manual of Cross-Connection Control, tenth edition, and that an inspection tag is required after testing, calibration, or repair. The tag must show the inspector’s name, the date, and the model, serial number, and size of the device, and it must be waterproof and protected against tampering. Those are inspector duties. They are not a procedure for an owner to perform. The rule text in the manual does not say ASSE or ABPA certification replaces the Indiana registration.

Official resources in Indiana

IDEM cross-connection manual page

IDEM’s manual landing page, including the central-office telephone.

IDEM cross-connection manual PDF

Reprints 327 IAC 8-10, including inspector registration and annual test intervals.

IDEM livestock backflow fact sheet

Says 327 IAC 8-10 requires public water systems to develop and implement a cross-connection control program.

Key facts for Indiana

What to do next

  1. Ask for the inspector’s registration number and check it the way the IDEM manual describes.
  2. Ask whether the person is on IDEM’s Active list; the manual says that list depends on a questionnaire.
  3. Expect a waterproof tag with the inspector’s name, the date, and the device’s model, serial number, and size.
  4. Allow access for the test; the rule requires the customer to permit reasonable access.

Looking for your city or county in Indiana?

We haven't found official program-level pages for Indiana we can verify yet, so we don't show local numbers here rather than guess. Here's what to use instead, in order:

  1. General Start with the statewide information above. It applies across Indiana, but cities and counties can add their own steps, fees or deadlines.
  2. Call to confirm Ask the official office. They have the current local rule, fee and form.
    IDEM cross-connection control manual
    Website →
    Phone: (317) 232-8603 (as listed on that page, checked Oct 4, 2026)
    Your city or county office: Local governments →
    Not sure who handles it locally? USAGov's free help line, 1-844-872-4681, or the Indiana page on USA.gov can point you to the right office.
  3. Know the current info? Tell us and include a link to the official page. We check every tip before it goes up.

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