The Sigma Group, Inc. is a radon mitigation provider based in Hartford, WI, credentialed by NRPP.
Address: Hartford
Wisconsin
United States
Wisconsin
United States
Phone: (414) 643-4200
Certifications: NRPP
Certification IDs:
NRPP 107755-RMS (Stephen R. Meer; Radon Mitigation Specialist; expires October 31, 2028) | NRPP 116337-RMS (Rebecca Brown; Radon Mitigation Specialist; expires September 30, 2028)
License Type: Radon mitigation (Radon Mitigation Specialist)
Certified Specialists: 2
Data Sources:
https://nrpp.info/listings/bl-22820.html | https://nrpp.info/listings/bl-9717.html
Last Checked: 2026-11-02
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