Wisconsin radon resources

Who answers what in Wisconsin

Wisconsin Department of Health Services radon programme

State radon information, testing guidance, regional radon information centres, and referral to nationally certified professionals.

NRPP or NRSB (national radon proficiency programmes)

Whether a specific contractor’s certification is current, and in which category.

Your municipal building department

Permit requirements for mitigation work in your jurisdiction.

Licensing and credentials

Wisconsin does not license radon professionals at state level. The state health department directs homeowners toward professionals credentialed through the national radon proficiency programmes — NRPP or NRSB. In an unlicensed state, that national certification is the credential, not a supplement to one.

What to verify before you hire

• Ask which national certification the contractor holds, and in which category.
• Verify currency directly with NRPP or NRSB rather than accepting a logo on a quote.
• Apply extra scrutiny to the written scope, the warranty terms, and whether verification testing is included.
• Ask for a sample written scope of work before signing — in an unlicensed state, documentation is the credential.

Disclosure and transactions

Wisconsin does not have a radon-specific disclosure statute equivalent to Minnesota’s Radon Awareness Act. Radon is addressed through the general Real Estate Condition Report, where sellers report conditions they are aware of. Buyers should order their own test during the inspection period rather than relying on seller knowledge, and any mitigation is negotiated between the parties.

Testing resources

Start with a short-term test on the lowest lived-in level under closed-building conditions. The state health department publishes testing guidance and operates regional radon information centres that can point you to local resources.

What this page deliberately does not state

We do not restate NRPP or NRSB certification requirements, fees, or category definitions, because those are set by the programmes themselves and change independently of us. Contact them directly.

Wisconsin markets and cities we cover

• Madison & Dane County — Madison, Middleton, Sun Prairie, Verona, Waunakee, Stoughton

More on Wisconsin

• For Wisconsin radon contractors — what we verify before routing a request, and how requests are matched.
• Who licenses radon work — State licence, state certification, or national credential — and what each means when you check a contractor.
• All state resource centres — how the ten states we serve differ on licensing and disclosure.
• How state radon certification differs — the homeowner guide to what a credential actually means.