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Radon Measurement and Mitigation Contractors

Interested in becoming a certified radon measurement or mitigation contractor?

Trainings are held in Wisconsin twice per year; check the training page to get dates and locations. To be listed on this page, contact the Wisconsin Radon Grant Manager at DHSEnvHealth@dhs.wisconsin.gov once you obtain certification.


Certified radon measurement and mitigation

Below is a list of contractors certified for measuring radon and reducing it. These contractors must pass a national exam, meet continuing education requirements, maintain a quality-assurance program, and follow appropriate testing protocols to be listed on this page.

Being listed on this page does not constitute endorsement by the State of Wisconsin or the Department of Health Services. The lists are provided as an additional resources for interested individuals.

Wisconsin has no radon regulations. As a result, homeowners are best served by educating themselves as much as possible before hiring a contractor and having a system installed. Before selecting a contractor from the Wisconsin list, first read the U.S. Environmental Protection Agency (EPA) booklet Consumers Guide to Radon Reduction. On page 4 there is a checklist to use as a guide for selecting a contractor.

The following are some additional general tips for those who need to hire a contractor.

  1. The certified individual must show up at the job site, at least to supervise, although they don't have to stay throughout the work. When inquiring about estimates, ask the person answering a call if the certified individual will be doing the work or at least inspect the system, and be sure he or she does.
  2. The fan must be outside the basement and the exhaust stack must go up to the roof, at least 10 feet above ground and 2 feet above any windows less than 10 feet away. If the exhaust is released at the sill of a house, some of this radon can enter the house through openings at the sill plate (where the basement sucks it in), and potentially into nearby windows. Studies have shown the average indoor radon can be increased by 1 pCi/L or more by these effects. In addition, experienced EPA contractors show that the joints and couplings to radon fans tend to leak radon on the high pressure side, significantly reducing the effectiveness of mitigation systems with fans in basements.
  3. For a list of mitigation system standards see the U.S. Environment Protection Agency (EPA) booklet Consumer's Guide to Radon Reduction, or call a Wisconsin Regional Radon Information Center toll-free, 1-888-LOW-RADON.
  4. These lists are updated frequently, but may not reflect the most current information. To find the status of a contractor's certification, visit the National Radon Proficiency Program (NRPP) and National Radon Safety Board (NRSB) websites and search for the contractor by name or zip code.

Sorted by county: Each contractor serves surrounding counties.

NameCredentialsExpirationCompany NameCountyTelephone
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsAshland218- 727-0356
218-391-0356
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsBarron218- 727-0356
218-391-0356
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsBayfield218- 727-0356
218-391-0356
Adam OlinskiNRPP: RT-1042543/31/2024A-1 Radon & VacuumBrown920-639-6542
Jason TrimbergerNRPP: RT-1062265/31/2025Great Lakes Radon Testing & Mitigation LLCBrown920-660-6324
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsBurnett218- 727-0356
218-391-0356
Matthew AntczakNRPP: RT-11174012/31/2024CESA10Chippewa715-271-5297
Chandler BernklauNRPP: 112573-RT1/31/2024Radon Solutions LLC.Chippewa715-644-8352
Jeffrey HartmanNRPP: 104925-RT5/31/2025Wisconsin Radon Measurement & MitigationChippewa715-559-0684
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsChippewa218- 727-0356
218-391-0356
Carl J. FrancisNRPP: RT-1036592/29/2024Radon Measurement and MitigationColumbia920-948-1345
Lance N. RuleNRPP: RT-1086224/30/2024Wisconsin Radon Services LLCColumbia608-279-7853
Jason BenderNRPP: RT-1128104/30/2024Rock Mechanical LLCDane608-422-2789
Lance N. RuleNRPP: RT-1086224/30/2024Wisconsin Radon Services LLCDane608-279-7853
Michael GallagherNRPP: RMP-1062507/31/2025MPG Radon ServicesDane608-516-5541
Kirk MeffordNRPP: 108789-RMP7/31/2024Madison Radon Testing, LLCDane608-438-7831
Lindsay MeffordNRPP: 108534-RMP4/30/2024Madison Radon Testing, LLCDane608-438-7831
Brian KennihanNRPP: RT-1121545/31/2025AprilaireDane800-334-6011
Grant MeadowsNRPP: RT-11227512/31/2023AprilaireDane608-310-6266
Leonard WilkoszNRSB: RMS-16SS0607/20/2024Wolf Home Inspection, LLCDane608-234-0455
Tami JaeckNRPP: RT-1120415/31/2025HSH Property InspectionDodge262-305-0314
Gary MillikinNRPP: RT-1099718/31/2024R.E. Millikin Construction Ltd.Dodge414-510-2331
Paul VanEngenNRPP: 113462-RMP12/31/2024Inspect The Best WIDodge262-665-9990
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesDodge262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesDodge262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesDodge262-797-8949
Robert LiethaNRSB: RT-1084572/29/2024Inspector Rob Agency, LLCDouglas218-393-6482
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsDouglas218- 727-0356
218-391-0356
Derick LevertyNRPP: 110733 RT1/31/2024Radon Associates, LLCDunn866-697-2366
Michael LangerNRPP: 105758 RT6/30/2024Langer ConstructionDunn651-261-1830
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsDunn218- 727-0356
218-391-0356
Damian TreiberNRPP: RT-1003372/29/2024Radon Contractors, Testing, and MitigationFlorence906-774-3795
FAX
906-774-2257
Jerome O'CallaghanNRPP: RT-1058887/31/2024Wisconsin Radon and Environmental, LLCFond du Lac414-477-6026
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesFond du Lac262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesFond du Lac262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesFond du Lac262-797-8949
Thomas J. BeattyNRPP: 110281 RT5/31/2025Inspection Services of Wisconsin LLCGreen Lake920-284-4806
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsIron218- 727-0356
218-391-0356
Joseph DachNRPP:110637-RT5/31/2025Area Inspection ServicesJefferson920-988-8035
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesJefferson262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesJefferson262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesJefferson262-797-8949
Peter DeckerNRPP: 113640-RMP7/31/2025Pioneer Engineering & Environmental Services, LLCKenosha773-722-9200 x110
Terry JohnsonNRPP: RT-1119413/31/2025T - Rex Inspections LLCKenosha262-581-3367
Karla NewmanNRPP: RT-1030093/31/2025Radon Remedy - Testing DivisionKenosha262-577-5515
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesKenosha262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesKenosha262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesKenosha262-797-8949
Tim OglesbyNRPP: 111019-RT12/31/2023Safe Haven Radon SolutionsKenosha262-620-8262
Paul VanEngenNRPP: 113462-RMP12/31/2024Inspect The Best WIKenosha262-665-9990
Travis FronkNRPP: RT-1097604/30/2024Absolute Inspection, LLCLa Crosse608-636-4772
Lucas EricksonNRPP: RT-1081509/30/2024Erickson Radon SolutionsLafayette608-558-6155
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsLincoln218- 727-0356
218-391-0356
Benjamin StrombergNRPP: RT-1075385/31/2024Abatron EngineeringMarathon715-675-7277
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesMilwaukee262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesMilwaukee262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesMilwaukee262-797-8949
Jerome O'CallaghanNRPP: RT-1058887/31/2024Wisconsin Radon and Environmental, LLCMilwaukee414-477-6026
Chad RognessNRPP: RT-10936712/31/2024Lifetime Radon SolutionsMilwaukee262-955-5701
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesOzaukee262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesOzaukee262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesOzaukee262-797-8949
Paul VanEngenNRPP: 113462-RMP12/31/2024Inspect The Best WIOzaukee262-665-9990
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsPierce218- 727-0356
218-391-0356
Mike BoumeesterNRPP: RT-1083866/30/2024Radon Associates, LLCPolk866-697-2366
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsPolk218- 727-0356
218-391-0356
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsPrice218- 727-0356
218-391-0356
Dixie WeidmanNRPP: RT-11191410/31/2025Northwoods Property InspectionsPrice715-934-9105
Michael WeidmanNRPP: RT-1119137/31/2025Northwoods Property InspectionsPrice715-934-9105
Joe BednarekNRPP: 110820-RT11/30/2025Quality Inspections, LLC dba National Property InspectionsRacine262-636-9909
Scott ClevenNRPP: RT-10808511/30/2023Timber Ridge Home Inspection LLCRacine262-770-2864
Kenneth W NaujockNRPP: 110593-RMP12/31/2023Radon Gone LLCRacine262-227-4956
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesRacine262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesRacine262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesRacine262-797-8949
James SeichterNRPP: RT-1085784/30/202424x7 Home InspectionsRock608-302-5494
John ThompsonNRPP: RT-1097584/30/2024A.T. Pro Mitigation SystemsRock608-758-0291
Jeff AndersonNRPP: RMP-1123513/31/2024Anderson RadonRock815-353-7846
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesRock262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesRock262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesRock262-797-8949
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsRusk218- 727-0356
218-391-0356
Jeff ScottNRPP: RT-1079743/31/2025Wisconsin Inspection Services & Consulting, LLCSauk608-434-0790
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsSawyer218- 727-0356
218-391-0356
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesSheboygan262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesSheboygan262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesSheboygan262-797-8949
Jesse GreenNRPP: RT-1075534/30/2024American Radon MitigationSt. Croix612-474-1004
Ryan StewartNRPP: RT-1105624/30/2025Straight Answer Home Inspections LLCSt. Croix715-529-1889
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsSt. Croix218- 727-0356
218-391-0356
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsTaylor218- 727-0356
218-391-0356
Jim SchallerNRPP: RT-1098878/31/2024Professional Radon ServiceVernon608-606-3014
David CookNRPP: 107864-RMP1/31/2025Apostle Radon and Indoor Air SolutionsWalworth262-749-4266
Thomas B Cook Jr.NRPP: 111255-RT8/31/2024Tom's Mitigation, LLCWalworth262-749-1292
Michael JensenRNI20202096/30/2025MJ Home Services, Inc.Walworth815-355-8675
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesWalworth262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesWalworth262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesWalworth262-797-8949
Jerry KramerNRPP: RT-1122376/30/2025Northern Waters Inspection and TestingWashburn715-255-0478
Kenneth Van DykeNRPP: RT-1090207/31/2025Van Dyke Home InspectionsWashburn218- 727-0356
218-391-0356
Tami JaeckNRPP: RT-1120415/31/2025HSH Property InspectionWashington262-305-0314
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesWashington262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesWashington262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesWashington262-797-8949
Paul VanEngenNRPP: 113462-RMP12/31/2024Inspect The Best WIWashington262-665-9990
Jennifer CampbellNRPP: RT-1063687/31/2025Lifetime Radon Solutions, Inc.Waukesha262-955-5701
Brian ThompsonNRPP: RT-1095912/29/2024Lifetime Radon Solutions, Inc.Waukesha262-955-5701
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesWaukesha262-797-8949
FAX
262-797-0798
George BoothNRPP: 1099471/31/2024SWAT EnvironmentalWaukesha262-754-2211
Gavin KosekNRPP: 112201-RT6/30/2025SWAT EnvironmentalWaukesha262-754-2211
Paul NicholsonNRPP: RT-10241711/30/2025Radon Measurement and Elimination ServicesWaukesha262-797-8949
Chase NicholsonNRPP: 104943-RMP2/29/2024Radon Measurement and Elimination ServicesWaukesha262-797-8949
Pierce NicholsonNRPP: 108069-RMP12/31/2023Radon Measurement and Elimination ServicesWaukesha262-797-8949
Josh OstbyNRPP: 111509-RT9/30/2024SWAT EnvironmentalWaukesha608-215-2241
Marc TarkowskiNRPP: 111648-RT1/31/2025Advanced Inspections, LLCWaukesha262-354-5643
Kevin TollNRPP: 113279-RMP9/30/2024Kettle Moraine Heating & Air Conditioning, LLCWaukesha262-221-9323
Paul VanEngenNRPP: 113462-RMP12/31/2024Inspect The Best WIWaukesha262-665-9990

Sorted by county: Each contractor serves surrounding counties.

NameCredentialsExpirationCompany NameCountyPhone
Jamie AdamskiNRPP: 104698-RMS11/30/2025Adamski Builders, LLCAshland, Bayfield, Burnett218-727-2495
Jason TrimbergerNRPP: 106227RMT5/31/2025Great Lakes Radon Testing and Mitigation, LLCBrown920-660-6324
Adam OlinskiNRPP: 104255RMT3/31/2024A-1 Radon & VacuumBrown920-639-6542
Chandler BernklauNRPP: 112574-RMS1/20/2024Radon Solutions LLC.Chippewa715-644-8352
Jeffrey HartmanNRPP: 104926RMT5/31/2025Wisconsin Radon Measurement and MitigationChippewa715-559-0684
Carl FrancisNRPP: 103660RMT2/28/2024Radon Measurement and Mitigation, Inc.Columbia920-948-1345
Lance RuleNRPP: RMT-1086234/30/2024Wisconsin Radon Services LLCColumbia608-279-7853
Lance RuleNRPP: RMT-1086234/30/2024Wisconsin Radon Services LLCDane608-279-7853
Michael GallagherNRPP: 106251-RMS7/31/2025MPG Radon ServicesDane608-516-5541
David CookNRPP: 107496-RMS3/31/2024Apostle Radon and Indoor Air SolutionsDane262-749-4266
Grant MeadowsNRPP: RMT-11227612/31/2023AprilaireDane608-310-6266
Gary MillikinNRPP: 109972RMT8/31/2024R.E. Millikin Construction Ltd.Dodge414-510-2331
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesDodge262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesDodge262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesDodge262-797-8949
Rodney ReibleNRPP: 107491RMT3/31/2024Advanced Radon SolutionsDodge920-296-4310
Jamie AdamskiNRPP: 104698-RMS11/30/2025Adamski Builders, LLCDouglas218-727-2495
Jeffrey HartmanNRPP: 104926RT5/31/2025Wisconsin Radon Measurement and MitigationEau Claire715-559-0684
Ron CutterNRPP: 106065RMT5/31/2025Cutter Vac, LLCFond du Lac920-922-3360
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesFond du Lac262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesFond du Lac262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesFond du Lac262-797-8949
Cameron ChristensonNRPP: RMT-1092438/31/2025Hady Electric, Inc.Jefferson920-261-4947
Joseph DachNRPP:110638RMT5/31/2025Area Inspection ServicesJefferson920-988-8035
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesJefferson262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesJefferson262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesJefferson262-797-8949
Karla NewmanNRPP: 101916RMT3/31/2025Radon Remedy, LLCKenosha800-917-2366
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesKenosha262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesKenosha262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesKenosha262-797-8949
Jeff TenutaNRPP: 101809RMT3/31/2025American Radon Removal CoKenosha262-657-9000
Tim OglesbyNRPP: 111020RMT12/31/2023Safe Haven Radon SolutionsKenosha262-620-8262
Josh DummerNRPP: RMT -1089411/31/2025Radon Service Plus LLCLa Crosse608-304-5925
Lucas EricksonNRPP: 108151RMT9/30/2024Erickson Radon SolutionsLafayette608-558-6155
Mark HoweNRPP: 104707RMT9/30/2025Howe Radon ContractingMarathon715-370-1402
Benjamin StrombergNRPP: 107539RMT5/31/2024Abatron EngineeringMarathon715-675-7277
Scot WickersheimNRPP: 112866-RMS5/31/2024The Radon Man of Wisconsin: info@theradonmanofwi.comMarathon715-870-5887
Jerome O' CallaghanNRPP: 105889RMT7/31/2024Wisconsin Radon and EnvironmentalMilwaukee414-477-6026
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesMilwaukee262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesMilwaukee262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesMilwaukee262-797-8949
Chad RognessNRPP: 106455RMT1/31/2024Lifetime Radon SolutionsMilwaukee262-955-5701
Chris BonniwellNRPP: 112138 RMT5/31/2025Protect EnvironmentalOzaukee262-202-7393
Eric John LehnerNRPP: 106393 RMT2/28/2024Stonehenge Development IncOzaukee414-659-0928
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesOzaukee262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesOzaukee262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesOzaukee262-797-8949
Ethan SandstromNRPP: RMT-10752111/30/2024Better Basement SolutionsPierce715-307-9718
Mike BoumeesterNRPP: RMT-1087126/30/2024Radon Associates, LLCPolk866-MY-RADON
866-697-2366
Anthony WalterNRPP:108380RMT12/31/2025All Electric, LLCPortage715-897-2693
Kenneth W NaujockNRPP: 110594-RMS12/31/2023Radon Gone LLCRacine262-227-4956
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesRacine262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesRacine262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesRacine262-797-8949
Jeff AndersonNRPP: 112629 RMS2/29/2024Anderson RadonRock815-353-7846
David CookNRPP: 107496-RMS3/31/2024Apostle Radon and Indoor Air SolutionsRock262-749-4266
Jeff KarichNRPP ID 106046RMT5/31/2024Superior Radon Mitigation, LLCRock800-631-1403
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesRock262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesRock262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesRock262-797-8949
John ThompsonNRPP: 103633RMT10/31/2025A.T. Pro Mitigation SystemsRock608-758-0291
Jamie AdamskiNRPP: 104698-RMS11/30/2025Adamski Builders, LLCSawyer218-727-2495
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesSheboygan262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesSheboygan262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesSheboygan262-797-8949
Jesse GreenNRPP: RMT 1075544/30/2024American Radon MitigationSt. Croix612-474-1004
Ryan StewartNRPP: RMT-1105634/30/2025Straight Answer Home Inspections LLCSt. Croix715-529-1889
Mike BoumeesterNRPP: RMT-1087126/30/2024Radon Associates, LLCSt. Croix866-MY-RADON
866-697-2366
Michael LangerNRPP: 105759RMT6/30/2024Langer ConstructionSt. Croix651-261-1830
Derick LevertyNRPP: 110733 RT1/31/2024Radon Associates, LLCSt. Croix866-697-2366
Jeff NelsonNRPP: 104202RMT11/30/2024Nelson Construction Radon Systems & ServiceSt. Croix715-781-5542
Jim SchallerNRPP: 110003RMT8/31/2024Professional Radon ServiceVernon608-606-3014
David CookNRPP: 107496-RMS3/31/2024Apostle Radon and Indoor Air SolutionsWalworth262-749-4266
Thomas B. Cook Jr.NRPP: 111216 RMT8/31/2024Tom's Mitigation LLCWalworth262-749-1292
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesWalworth262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesWalworth262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesWalworth262-797-8949
Jamie AdamskiNRPP: 104698-RMS11/30/2025Adamski Builders, LLCWashburn218-727-2495
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesWashington262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesWashington262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesWashington262-797-8949
Brian ThompsonNRPP: RMT-1096192/29/2024Lifetime Radon SolutionsWaukesha262-955-5701
Timothy HennemanNRPP: 11934RMT6/30/2025Lifetime Radon SolutionsWaukesha262-955-5701
David CookNRPP: 107496-RMS3/31/2024Apostle Radon and Indoor Air SolutionsWaukesha262-749-4266
Kevin TollNRPP: 113260-RMS9/30/2024Kettle Moraine Heating & Air Conditioning, LLCWaukesha262-221-9323
Gary LuszNRPP: 105001RMT10/31/2024Best Radon Solutions, LLCWaukesha262-745-4764
Paul NicholsonNRPP: 102418RMT11/30/2025Radon Measurement and Elimination ServicesWaukesha262-797-8949
Chase NicholsonNRPP: 104944-RMS2/29/2024Radon Measurement and Elimination ServicesWaukesha262-797-8949
Pierce NicholsonNRPP: 108070-RMS12/31/2023Radon Measurement and Elimination ServicesWaukesha262-797-8949
Rick WeberNRPP: 104185RMT3/31/2025Radon Rescuers, LLCWaukesha262-470-5332
Mike GryszkiewiczNRPP: 104175RMT3/31/2025Radon RescuersWaukesha262-844-4267
George BoothNRPP: 107258RMT1/31/2024SWAT EnvironmentalWaukesha414-442-1300
Mike GreenNRPP: 111398 RMT8/31/2024SWAT EnvironmentalWaukesha262-754-2211
Gavin KosekNRPP: 112202 RMT6/30/2025SWAT EnvironmentalWaukesha262-754-2211
Adam WeberNRPP: 105560 RMT11/30/2023Marshfield Radon ServiceWood715-305-6954

National Radon Consensus Standards

These standards are free for online-viewing and provide guidance on radon measurement and mitigation efforts of all building types. We encourage the use of these current codes and standards to help ensure public health protection.

Looking outside Wisconsin?

These lists are from two national certifying organizations that have the most current information:

Last revised February 27, 2024