Backflow Tester List

State rules

Mississippi

The Mississippi State Department of Health drinking-water regulations require every public water supply to adopt a cross-connection control policy no less stringent than the regulation, and no more stringent than Mississippi Code section 41-26-14. When a reduced-pressure principle assembly, double check valve assembly, or pressure vacuum breaker is installed to protect the public system, required inspection and testing are performed by a person licensed as a Certified Tester by the Department. The Department develops and administers the certification test at the end of each approved training program. A written score of at least 70 percent and a successful performance test on the three assembly types are required. Certification expires three years from the date issued.

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 Mississippi State Department of Health licenses Certified Testers and requires public water supplies to enforce a cross-connection program.
Who may test an assembly
A Certified Tester licensed by the Department performs required inspection and testing of the assemblies named in the rule.
Official program page
Official page →

The regulations separate hazards. A high-hazard cross-connection involves material dangerous to health under pressure or negative pressure, and it is removed by an air gap or protected by a Department-recommended assembly. Irrigation that injects or stores lawn chemicals, or that connects to wastewater, is high hazard. Professionally installed irrigation that does none of those things is on the very-low-risk list and is not required to have a preventer. Certain pools, drinking fountains, and chemical-free fire sprinklers are on that list too. The water system makes the hazard call, subject to Department review.

Reduced-pressure principle assemblies and pressure vacuum breakers are inspected and tested at least once a year by a Certified Tester, and every covered assembly is tested after installation and before the customer uses it. The tester gives the owner and the water system a written report on a Department form. Tester and system keep results at least five years. A reduced-pressure or pressure-vacuum-breaker assembly that fails must be repaired or replaced within thirty days. A double check that fails must be repaired or replaced within ninety days. Reduced-pressure and double-check assemblies shall not be located in a pit below ground level.

Training must be submitted to the Department at least 45 days before the course. The Department may, solely at its discretion and without testing, certify a tester who already holds certification from a nationally recognized program. The rule does not name that program. Recertification is by an examination the Department develops. Carbonated-beverage dispensers have a narrow exception if the connection is protected by a device conforming to ASSE 1022 or by an air gap, and if carbon dioxide does not affect the device and downstream piping. That ASSE number is a device standard in the beverage rule, not the tester license.

Official resources in Mississippi

Mississippi drinking water regulations

Contains the cross-connection program rules and the Certified Tester licensing rules.

Mississippi Safe Drinking Water Act compilation

Statute section on high-hazard and low-hazard cross-connections and the very-low-risk category.

EPA Cross-Connection Control Manual

Federal educational manual. It does not replace the Department’s Certified Tester license.

Key facts for Mississippi

What to do next

  1. Ask for the Department Certified Tester license, not only a course flyer.
  2. Tell the tester if the irrigation system injects chemicals; that is high hazard under the rule.
  3. If a test fails, note whether the assembly is a double check, because the repair window is longer.
  4. Do not put a reduced-pressure or double-check assembly in a below-ground pit.

Looking for your city or county in Mississippi?

We haven't found official program-level pages for Mississippi 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 Mississippi, 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.
    Mississippi State Department of Health public water supply regulations
    Website →
    Phone not shown: use the contact page on the official website above.
    Your city or county office: Local governments →
    Not sure who handles it locally? USAGov's free help line, 1-844-872-4681, or the Mississippi 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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