Certified radon testers & mitigatorsMinnesota — mitigation — verified 29 Aug 2026

§ 4.1 — Marshall, MN

Certified radon mitigation in Marshall, MN

2 current listings from the official file. Verify the credential number before you hire.

Last verified August 29, 2026. Methodology MN MDH.

Certified radon testingCertified radon mitigation

  1. Brian Swalboski

    Scarcely Ltd

    current MN MDH № RMITS-00055

    mitigation, testing

    (507) 929-9870August 29, 2026cite ↗

  2. Thor Wiebe

    Thor Wiebe Home Inspections

    current MN MDH № RMITS-00001

    mitigation, testing

    (507) 537-1956August 29, 2026cite ↗
Fig. 4 — Marshall, MN, approximate. Pin is the city on the official file, not a street address.

Appendix A — Before you hire

  1. Who holds the credential, and can they show the same number that appears on this page?
  2. What test method or mitigation system will they use for this building?
  3. How will they document results or the finished system?

§ 4.3

Nearby places in Minnesota

Minnesota MDH licenses radon measurement and mitigation professionals. The people below appear on the MDH Radon Service Providers search we imported (provider type + single-family service type, zip left blank for statewide). Read the methodology. Credential status can change.