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The planner repeats the verified state fields. It does not know your utility's extra registration list.

Start with the state, then ask the water system that serves the building. A state certification does not override a utility that requires its own registration.

If the page does not name a fee or a roster, we did not find one on the official source. Call the agency or the utility before you pay for a test.

Nothing you type into a tool is saved on our servers unless the tool says so. Letter builders and checklists run entirely in your browser.

Before you rely on a result

We compile from state drinking-water agencies and EPA primacy materials. We do not invent tester fees. This site is general information, not engineering, plumbing, or legal advice. Test rules change, and a water utility may be stricter than the state page. Confirm the credential with the official program and the utility before you hire.

Search is the right start when you know a city, county, or ZIP and need the matching state page. The planner is the right start when you already know the state and want the short list of official links. Guides explain the words those offices use. None of the three replaces the agency, court, or city office that enforces the rule.

If a number is missing, it stays missing. Backflow Tester List does not estimate fees, caps, deadlines, or roster status. The phrase “not published” means we did not find that figure on an official page we could verify. It does not mean the figure is zero, and it does not mean no rule exists. Open the linked government page and confirm it before you pay a fee, hire someone, or file a form.

Public pages move. When you spot a retired URL or a rule that has changed, use the contact form and include the new official link. We update a page after we can read the source, and we date the review.