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Radon in Illinois · IEMA-OHS Radon Active Licensee Listing · read October 15, 2026

Radon mitigation in Illinois: licensed contractors and state rules

Only people licensed by IEMA-OHS may test or mitigate radon for pay in Illinois, and the list names the business each one works for. This page shows every business on it for mitigation, with the ones that have a full listing first.

73mitigation businesses based in Illinois
249testing-only businesses
56 of 102counties in EPA Zone 1

17 Illinois mitigation businesses with a full listing

Each is on the IEMA-OHS Radon Active Licensee Listing and says on its own website which radon work it does, or publishes its own price. Order is by town; nobody pays for a place.

Protect Environmental

Bolingbrook, IL

IEMA-OHS mitigation license RNM20242846

Radon mitigation systemsCrawl space radon systemsRadon-resistant new construction

(630) 325-8005

Radon Gone, LLC

Chicago, IL

IEMA-OHS mitigation license RNM2020207, RNM20263637

Radon mitigation systemsCrawl space radon systemsCommercial and multifamily buildings

(847) 668-5313

VSI Radon Reduction Corp

Ingleside, IL

IEMA-OHS mitigation license RNM2019201, RNMT2013206 +12

Radon mitigation systemsExisting system repair and upgradesRadon-resistant new construction

(815) 344-1100

Radon Right

Lincolnshire, IL

IEMA-OHS mitigation license RNM20232072

Radon mitigation systemsSub-slab depressurization

(224) 212-9698

Timmit Radon Systems

Marseilles, IL

IEMA-OHS mitigation license RNM98106

Radon mitigation systemsRadon-resistant new constructionWritten warranty on systems

(630) 205-3416

Radon Xpress Inc.

Naperville, IL

IEMA-OHS mitigation license RNM2016208

Radon mitigation systemsRadon fan replacementRadon-resistant new construction

(630) 797-9197

Inspect It Chicago

Oak Forest, IL

IEMA-OHS mitigation license RNM2018201

$1,750 to $3,000+ system Also licensed to test Radon mitigation systemsRadon testingCrawl space radon systems

(630) 890-8634

Every radon mitigation business on the IEMA-OHS list

73 businesses based in Illinois hold a mitigation license. Names link where a business has a full listing. Phones are the list's own; a row the list prints as a person shows no phone.

From the IEMA-OHS Radon Active Licensee Listing, read October 15, 2026.
BusinessTownLicense numbersPeopleAlso testsPhone
Clue Radon Services Addison RNM2019203 1 Yes (630) 724-7107
JC Radon Solutions Aurora RNM2022210, RNMT2022207 2 (630) 546-2007
Action Radon Mitigation Belleville RNM2010201 1 (314) 623-0116
Babb's Service Company Bloomington RNM2022201 1 (309) 829-9455
Protect Environmental Bolingbrook RNM20242846 1 (630) 519-6747
Mock's Radon Reduction Camp Point RNM2009203 1 (217) 242-3121
618 Construction services LLC Carterville RNM20232140 1 (618) 438-1694
Radon Gone, LLC Chicago RNM2020207, RNM20263637 2 (847) 668-5313
Central Illinois Radon Mitigation Decatur RNM2014212 1 (217) 520-6630
Radon Diversion Dixon RNM2010205 1 (815) 994-2073
Peoria Radon Mitigation Dunlap RNM20242839 1 (309) 243-7377
Peoria Radon Mitigation, Inc Dunlap RNM2010213, RNMT2014213, RNMT2021201 3 (309) 243-7377
TCD Radon Specialists LLC East Alton RNM20263501 1 (618) 823-8542
Schluter Radon Services East Peoria RNM2009209 1 (309) 369-7889
Radon Specialist Effingham RNM2003204 1 (217) 259-1504
CMXtreme Radon Elgin RNM20232114 1 (847) 452-4630
Radon Rescue Corporation Elgin RNM98125 1 (800) 500-1232
Radon Shield Elgin RNM20252945, RNMT20253232 2 (224) 652-9582
Illinois Radon Detection, Inc. Elmhurst RNM20253114 1 Yes (630) 674-5192
Northern Illinois Radon Remedies Inc Freeport RNM2021209 1 (815) 291-6745
Radon Services Girard RNM2013203 1 (217) 483-5198
Miller Environmental Mitigation LLC Glen Carbon RNM2013202 1 (618) 520-7409
Radon Reduction Company Glen Ellyn RNM2007208 1 (630) 544-1830
Air Sense Environmental Godfrey RNM20232346 1 (618) 593-4815
David Smith Radon Remedies Heyworth RNM2020203, RNMT2021211 2 (309) 777-3910
Advanced Radon Mitigation LLC Highland RNM2017206 1 (618) 910-2034
Nelson Radon Reduction Hopedale RNM2008201 1 (309) 241-8104
VSI Radon Reduction Corp Ingleside RNM2010204, RNM2010210, RNM2019201 +11 14 (815) 344-1100
Pro Radon Mitigations Johnsburg RNM2018208 1 (815) 287-9100
JW Summy Contracting Kewanee RNM20253263 1 (309) 525-1744
Midwest Radon Services, Inc. La Grange Park RNM2010208, RNMT2019201, RNMT2022201 +2 5 (708) 680-6080
Radon Right Lincolnshire RNM20232072 1 (224) 212-9698
Radon Mitigation Corporation Mahomet RNM20231851 1 (217) 841-7311
Stuedemann Radon Resolutions Marseilles RNM2010216, RNM20263459 2 (815) 343-7091
Timmit Radon Systems Marseilles RNM98106 1 (630) 205-3416
Superior Radon Solutions Minier RNM2016202 1 (309) 336-9534
Effective Home Services, LLC Naperville RNM20232035 1 (815) 483-8440
Radon Reduction Systems Inc Naperville RNM98124, RNMT2017208, RNMT20263609 3 (630) 357-9474
Radon Xpress Inc. Naperville RNM2016208 1 (779) 875-7226
CABENO Environmental Field Services New Lenox RNM2018205 1 (815) 774-3747
Inspect It Chicago Oak Forest RNM2018201 1 Yes (630) 890-8634
Radon Professional Services, LLC. Oak Park RNM2017207 1 Yes (708) 935-3206
Polar Heating and Air Conditioning Orland Park RNM20232108 1 (708) 448-1929
Summit Radon Mitigations, LLC. Orland Park RNM20242436 1 (708) 227-1870
Guardian Radon Mitigation & Electrical Services Oswego RNM2008209, RNM2022208, RNMT2017203 +1 4 (630) 768-9836
Illinois Valley Radon Mitigation, LLC Ottawa RNM2018203 1 (815) 313-5892
Premier Radon Mitigation, LLC Palatine RNM2021211, RNMT2011202 2 (312) 731-9391
Will County Radon Peotone RNM2011206 1 (815) 693-1526
BAN Radon Mitigation Specialist Plainfield RNM20232215 1 (708) 263-9896
Clean Air Radon Systems Plainfield RNM2017208 1 (630) 474-4455
MK Radon Specialists Plainfield RNM2020202 1 Yes (815) 666-8002
Professional Radon Systems, Inc Plainfield RNM2006206, RNMT2017202, RNMT2022204 3 Yes (630) 236-4200
Hammers Radon Mitigation Solutions Rochester RNM2022209 1 (217) 670-4292
Norwest Radon Remediation Rock Falls RNM2009204 1 (815) 590-1800
Gardner Services Rockford RNM2021202 1 (888) 715-3800
Radman Radon Rockford RNM2021204 1 (815) 721-4610
Radon Reduction Technologies Rockford RNM2011202 1 (815) 904-6002
Heritage Radon Mitigation, Inc. Saint Charles RNM2001202 1 (630) 377-9156
Ben Can Fix It Savanna RNM2022204 1 (815) 246-2654
Radaquest Radon Schaumburg RNM2021206 1 (630) 205-4223
U.S. Waterproofing & Foundation Repair Schaumburg RNM20263293 1 (800) 323-3628
Stuedemann Radon Resolutions Seneca RNM20232084 1 (815) 343-7090
Iconradon Shirley RNM20253081 1 (309) 445-4183
IEMA-OHS Radon Program Springfield RNM20242803 1
Central Radon Systems St Joseph RNM2010212 1 (217) 721-4683
American Radon Systems Tinley Park RNM2018212 1 (815) 370-9682
Illinois Cooling Experts LLC Troy RNM20252916 1 (618) 417-7276
Doug Stuedemann Radon Mitigation Verona RNM2019206 1 (815) 474-3940
DuPage Radon Contractors Warrenville RNM2013210, RNM2017203, RNMT2005202 +4 7 (630) 836-1918
Clarity Radon Solutions Wauconda RNM20242695 1 (847) 526-2606
Accurate Radon West Chicago RNM2003202 1 (630) 876-0800
Midwest Radon & Home Services Inc. West Dundee RNM20242434 1 (630) 709-4261
Radon Mitigation Masters LLC Yorkville RNM2017201 1 (630) 639-7217
Testing-only businesses by town (249)

Businesses on the list for testing (measurement) only, counted where the list places them. They are not listed one by one yet.

TownTesting-only businesses
Chicago21
Naperville9
Plainfield7
Rockford5
Elgin4
Highland Park4
Springfield4
Tinley Park3
Bourbonnais3
Palatine3
Lisle3
Washington3
Joliet3
Bloomingdale3
Arlington Heights3
Northbrook3
Aurora3
Mount Prospect2
Woodstock2
Westchester2
Wauconda2
Matteson2
Orland Park2
Sycamore2
Downers Grove2
Buffalo Grove2
Lockport2
Cary2
Hoffman Estates2
Mokena2
Manteno2
Oak Park2
Peoria2
Warrenville2
Decatur2
Bolingbrook2
Machesney Park2
Bloomington2
Libertyville2
Mundelein2
Oswego2
Gurnee2
Barrington2
Belleville2
Schaumburg2
West Chicago2
Westmont2
Glen Ellyn2
Mahomet1
Carpentersville1
Lake In The Hills1
La Grange1
Normal1
Swansea1
Geneseo1
Shorewood1
Freeport1
Grayslake1
Nauvoo, Il1
Medinah1
Bensenville1
Woodridge1
Maywood1
Waterloo1
Industry1
Huntley1
Tuscola1
Skokie1
North Aurora1
Versailles1
Countryside1
La Grange Park1
Itasca1
Lincolnwood1
East Dubuque1
Oakbrook Terrace1
Marquette Heights1
Lemont1
Jacksonville1
Saint Louis1
Hanna City1
Lake Bluff1
Lake Villa1
Algonquin1
Western Springs1
Batavia1
Pocahontas1
Freeburg1
Farmer City1
Hanover Park1
South Holland1
Lake Zurich1
Shiloh1
Oakwood1
Oak Lawn1
Monee1
Moline1
Alton1
Elmhurst1
Macomb1
Monmouth1
Elburn1
Sullivan1
Volo1
Waltonville1
Deerfield1
Saint Charles1
East Peoria1
Yorkville1
Palos Heights1
Oak Forest1
Carbondale1
Pinckneyville1
Richmond1
Lake Forest1
Midlothian1
McHenry1
Dow1
New Lenox1
Crest Hill1
Millstadt1
Champaign1
Niles1
Park Ridge1
Sugar Grove1
O Fallon1
Morton Grove1
Streamwood1
Chenoa1
Maryville1
Wheaton1
Summit1
Leland1
Elk Grove Village1
Oakwood Hills1
Princeville1
Poplar Grove1
Windsor1
Homer Glen1
Lena1
Oregon1
Big Rock1
Manhattan1
Roselle1
Glendale Heights1
Princeton1
Fox Lake1
Collinsville1
South Elgin1
Wonder Lake1
Du Quoin1

Illinois's radon licensing rules

License needed to test or mitigate
Anyone paid to test a building for radon, analyze radon samples, or reduce radon in Illinois must hold a license from IEMA-OHS (Radon Industry Licensing Act, 420 ILCS 44/25).Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026
Home inspectors need the radon license
A home inspector who runs radon tests for clients needs an IEMA-OHS measurement license. The only retail exemption excludes sellers that also serve the client through home inspection or real estate representation.Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026
Four individual license types
IEMA-OHS issues four individual radon licenses: measurement professional, measurement technician, mitigation professional and mitigation technician. Laboratories are licensed separately.Illinois General Assembly, Joint Committee on Administrative Rules (Illinois Administrative Code), read October 15, 2026
Technicians work under a professional
A measurement technician license only allows work under the general supervision of a licensed measurement professional.Illinois General Assembly, Joint Committee on Administrative Rules (Illinois Administrative Code), read October 15, 2026
Unlicensed helpers need on-site supervision
An unlicensed person may only do radon measurement or mitigation work with a licensed person directly supervising on site.Illinois General Assembly, Joint Committee on Administrative Rules (Illinois Administrative Code), read October 15, 2026
Owners testing their own home
A person testing or mitigating the home they live in does not need a radon license.Illinois General Assembly, Joint Committee on Administrative Rules (Illinois Administrative Code), read October 15, 2026
Course and national exam first
Applicants first complete an IEMA-OHS approved qualification course, then pass a national exam. IEMA-OHS no longer gives its own exam and accepts the NRPP and NRSB exams.Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), read October 15, 2026
Annual license fees
The yearly fee is $500 for a measurement or mitigation professional license and $250 for a technician license.Illinois General Assembly, Joint Committee on Administrative Rules (Illinois Administrative Code), read October 15, 2026
Continuing education each year
Each individual license needs 6 continuing education credits per year; a person holding both a measurement and a mitigation license needs 12.Illinois General Assembly, Joint Committee on Administrative Rules (Illinois Administrative Code), read October 15, 2026
Results due within 45 days
The tester must give the client the radon test results within 45 days after testing.Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026
Mitigators cannot test own work
A mitigator who also holds a measurement license may not do the before or after tests at a house where they installed the system, unless another independent person has measured.Illinois General Assembly, Joint Committee on Administrative Rules (Illinois Administrative Code), read October 15, 2026
IEMA active licensee lookup
IEMA-OHS publishes a searchable list of active radon licensees that can be filtered by employer, license type, service county or city.Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), read October 15, 2026

A home inspector who runs radon tests needs this license too. Illinois home inspector licensing

Radon when a Illinois home is sold

Pamphlet and disclosure form
Before a buyer is bound by a purchase contract, the seller must give the buyer the IEMA pamphlet Radon Testing Guidelines for Real Estate Transactions and the Illinois Disclosure of Information on Radon Hazards form.Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026
No seller testing requirement
The Radon Awareness Act does not require a seller to test for radon or to mitigate.Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026
Seller shares known results
A seller must hand over any radon test results in their possession that show elevated levels in the home.Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026

Illinois radon disclosure rules in full

New homes

Passive system in new homes
All new residential construction in Illinois must include passive radon resistant construction (Radon Resistant Construction Act, 420 ILCS 52/20).Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026
What counts as new residential
The rule covers original construction of single family homes and buildings with two or fewer apartments, condominiums or town houses.Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026
Effective June 1, 2013
The Radon Resistant Construction Act took effect on June 1, 2013.Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026
Who may install and activate
The builder or its subcontractors may install the passive pipe, but only a licensed radon contractor may add a vent fan or turn it into an active system.Illinois General Assembly (Illinois Compiled Statutes), read October 15, 2026

What the state program says

Test every home
IEMA-OHS says elevated radon has been found throughout Illinois and every home should be tested wherever it is.Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), read October 15, 2026
Action level 4.0 pCi/L
IEMA-OHS and US EPA recommend reducing radon when a home measures 4.0 pCi/L or more.Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), read October 15, 2026
County map data years
IEMA-OHS's interactive county and ZIP radon map uses licensee measurement reports from 2003 to 2019 and mitigation reports from 2005 to 2011.Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), read October 15, 2026
Map not a testing guide
IEMA-OHS says its county and ZIP map is not meant to decide whether a home should be tested, and the map keeps only the highest submitted result per address.Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), read October 15, 2026

EPA radon zones for Illinois's 102 counties

Zone 1: 56 counties. Zone 2: 43. Zone 3: 3. EPA's zones predict county averages; EPA says the map should not decide whether a home is tested, because high homes turn up in every zone.

Zone by county (102)
From EPA's county zone spreadsheet, read October 15, 2026.
CountyEPA zone
Adams County1
Alexander County3
Bond County2
Boone County1
Brown County1
Bureau County1
Calhoun County1
Carroll County1
Cass County1
Champaign County1
Christian County2
Clark County2
Clay County2
Clinton County2
Coles County1
Cook County2
Crawford County2
Cumberland County2
De Witt County1
DeKalb County1
Douglas County1
DuPage County2
Edgar County1
Edwards County2
Effingham County2
Fayette County2
Ford County1
Franklin County2
Fulton County1
Gallatin County2
Greene County1
Grundy County1
Hamilton County2
Hancock County1
Hardin County2
Henderson County1
Henry County1
Iroquois County1
Jackson County2
Jasper County2
Jefferson County2
Jersey County1
Jo Daviess County1
Johnson County2
Kane County1
Kankakee County2
Kendall County1
Knox County1
Lake County2
LaSalle County1
Lawrence County2
Lee County1
Livingston County1
Logan County1
Macon County1
Macoupin County2
Madison County2
Marion County2
Marshall County1
Mason County1
Massac County3
McDonough County1
McHenry County2
McLean County1
Menard County1
Mercer County1
Monroe County2
Montgomery County2
Morgan County1
Moultrie County1
Ogle County1
Peoria County1
Perry County2
Piatt County1
Pike County1
Pope County2
Pulaski County3
Putnam County1
Randolph County2
Richland County2
Rock Island County1
Saline County2
Sangamon County1
Schuyler County1
Scott County1
Shelby County2
St. Clair County2
Stark County1
Stephenson County1
Tazewell County1
Union County2
Vermilion County1
Wabash County2
Warren County1
Washington County2
Wayne County2
White County2
Whiteside County1
Will County2
Williamson County2
Winnebago County1
Woodford County1

Sources for this page

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