Accurate Radon
(630) 876-0800✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon in DeKalb County, Illinois
Last updated
Zone 1 Highest potential. Predicted average indoor screening level above 4 pCi/L.
DeKalb County is one of 56 Illinois counties (out of 102) that EPA places in Zone 1. 22 ZIP codes reach into the county, 7 of them entirely. We list 139 radon professionals for DeKalb County, each checked against the state’s official list.
What the zone means for a DeKalb County home
Zone 1 means EPA predicted an average indoor screening level above 4 pCi/L for DeKalb County as a whole, the level at which EPA says to fix a home. High readings are common here, so a test is especially worthwhile, and new homes in DeKalb County are good candidates for radon-resistant construction.
A short-term test kit costs little and takes two to seven days. If your result is 4 pCi/L or higher, EPA recommends a follow-up test and, if it is confirmed, a mitigation system, which typically uses a pipe and fan to pull soil gas from under the foundation and vent it above the roof. Check a result with the level calculator and plan your next step with the follow-up planner.
Radon professionals for DeKalb County
Illinois listings show the counties each licensee told IEMA they serve. Listings are free. Featured listings are paid placements and are labelled.
Ben Can Fix It
(815) 246-2654✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Central Illinois Radon Mitigation
(217) 520-6630✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
CleanVapor, LLC
(000) 000-0000✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
CMXtreme Radon
(847) 452-4630✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Doug Stuedemann Radon Mitigation
(815) 474-3940✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
DuPage Radon Contractors
(630) 836-1918✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Gardner Environmental Services, Inc.
(888) 715-3800✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Guardian Radon Mitigation
(630) 768-9836✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Heritage Radon Mitigation, Inc.
(630) 377-9156✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Illinois Valley Radon Mitigation, LLC
(815) 313-5892✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Inspect It Chicago
(630) 890-8634✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Lifetime Home Services, LLC
(262) 955-5701✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
MidAmerica Basement Systems
(563) 381-1700✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Midwest Radon & Home Services Inc.
(630) 709-4261✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Midwest Radon Services, Inc.
(708) 680-6080✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
MK Radon Specialists
(815) 666-8002✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Mock's Radon Reduction, Inc.
(217) 242-3121✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Northern Illinois Radon Remedies Inc
(815) 291-6745✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Norwest Radon Remediation
(815) 590-1800✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Peoria Radon Mitigation, Inc
(309) 243-7377✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Polar Heating and Air Conditioning
(708) 448-1929✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Professional Radon Systems, Inc
(630) 236-4200✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
QC Radon Removal, LLC
(563) 949-5430✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Defenders
(269) 446-0558✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Gone LLC
(847) 668-5313✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Mitigation Corporation
(217) 841-7311✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Professional Services
(708) 935-3206✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Reduction Company
(630) 544-1830✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Reduction Systems, Inc.
(630) 357-9474✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Reduction Technologies
(815) 904-6002✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Remedy
(262) 577-5515✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Rescue Corporation
(800) 500-1232✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Right LLC
(224) 212-9698✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Services
(217) 483-5198✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Solutions, LLC
(563) 386-8686✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Solutions, LLC
(563) 210-6029✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Stuedemann Radon Resolutions
(815) 343-7090✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Stuedemann Radon Resolutions
(815) 343-7091✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Summit Radon Mitigation
(708) 227-1870✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Swat Environmental
(262) 293-9180✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
SWAT Environmental
(262) 754-2211✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
SWAT Environmental
(920) 740-3041✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
SWAT Environmental
(414) 731-6215✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
SWAT Environmental
(844) 331-6440✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Timmit Radon Systems
(630) 205-3416✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
VSI Radon Reduction Corporation
(815) 344-1100✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
815 Radon
(815) 494-8286✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
A to Z Radon Inspectors
(708) 785-8855✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
AAS Radon Testing
(224) 440-2455✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Adem Radon Service
(630) 992-0789✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
All-Home Ispection services
(815) 751-1875✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Alpha Home Inspections
(630) 340-7723✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Arc-1 Radon Detection
(618) 606-5542✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Ashley Reitenbach
(312) 218-2882✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
At Ease Inspections
(630) 797-8069✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Bastian Home Inspection
(815) 232-3416✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Brickkicker Inc
(800) 821-1820✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Bucher's Radon testing LLC
(630) 632-9913✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Callaway & Associates, Inc
(217) 599-1209✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Carmen Mihaileanu
(312) 804-3618✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Carnow Conibear
(312) 782-4486✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Castle Home Inspection
(630) 462-1050✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Cebutilla Services
(630) 596-3057✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Check Radon
(708) 790-9070✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Checkpoint Inspections LLC
(708) 567-3512✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Chicago Radon Testing, Inc.
(312) 925-9996✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Chicagoland and Midwest Inspections LLC.
(773) 499-9687✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Classic Environmental Testing LLC
(224) 899-2707✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Consulting Solutions Inc.
(847) 690-0905✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
CSI Home Inspection Srvices Inc.
(630) 674-4599✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Dhanendra Sharma
(224) 432-7967✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Discover LLC
(866) 750-3456✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
DS Radon Services LLC
(630) 888-4008✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Duffield Consulting Engineers, Ltd.
(815) 693-9871✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
DuPage Radon Testing
(630) 225-7997✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Dynamic Radon Services
(847) 722-5626✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Eagle Eye Home and Property Inspections LLC
(847) 531-0530✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Ecosense
(408) 634-2955✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Express Home Inspections, LLC
(309) 360-3218✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Extra Mile Inspection
(847) 561-8232✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Foundation First Home Inspections LLC
(847) 807-5161✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Gallagher Bassett Services, Inc, WCD Group Division
(773) 750-6419✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Gallagher Bassett Technical Services
(630) 879-3006✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Gill Group
(800) 428-3320✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Got Radon? LLC
(262) 358-0997✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
GS and TJ Services
(815) 277-9678✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Hassan Adams
(872) 203-3445✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Home ase Radon Services
(630) 677-8776✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Home Inspections by Mr. Perfection, Inc.
(630) 932-9015✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Home Inspector Consultants, Inc
(815) 469-4116✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Home Raters, Inc.
(847) 433-3450✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
HouseMaster
(618) 977-7434✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
ILLIANA Home Inspection, LLC
(217) 853-3467✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Insight Home Inspections
(309) 558-8793✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Kane County Radon Testing LLC
(630) 777-8382✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Lask Inspection Group, LLC.
(815) 978-7785✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Lawlor Home Inspections
(201) 835-3295✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Libra Inspections LLC
(217) 402-8393✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Little Egypt Radon & Mold Testing
(618) 315-0768✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Local Radon Testing
(630) 881-2430✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Meck Home Inspections
(708) 300-5771✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Optimal Home Inspections, LLC
(773) 710-5891✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Perfection Home Inspection
(630) 904-2263✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Pillar to Post Home Inspectors
(815) 517-0025✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Platinum Radon Detectives
(847) 708-1368✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Powers Radon Mesurement Services
(217) 494-0300✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Precision Inspection Group
(708) 969-6017✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Pro Radon Testing LLC
(630) 589-4029✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Pro-Tech Home Inspections
(847) 815-4541✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Professional Radon Diagnostics
(312) 343-1736✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Professional Radon Testers
(630) 605-8964✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Property Guidance Inspection LLC
(773) 469-3390✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Quality Assurance Radon Testing, Inc.
(630) 973-9840✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radalink, Inc.
(770) 457-1944✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon and Mold Testers of Illinois
(773) 447-0639✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Diagnostics, Inc.
(847) 312-6538✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Rach LLC
(312) 401-9588✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Tec
(312) 246-2756✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon Testing Partners
(847) 409-8168✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
RadonEDU LLC
(630) 849-1671✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
RadonIQ
(224) 428-4270✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Reliable Radon Inspections, Inc
(877) 997-2366✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
RFD Radon LLC
(563) 949-0442✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Riaz Ahmed Radon Measurement
(630) 863-6358✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
RZ Radon Measurement Services
(630) 670-4202✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
S.O.S Radon Testing
(815) 895-2517✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
SafeSmart Home Inspection
(773) 993-4134✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Spot On Home Inspections Inc
(630) 542-0273✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Stro's Radon LLC
(815) 751-5273✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Syte Inspections LLC
(224) 400-1006✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
TEM Environmental, Inc.
(630) 790-0880✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
The BrickKicker
(630) 332-0804✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
the inspector llc
(773) 691-2180✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Tri-County Radon Measurement
(708) 429-0436✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Unique Radon Testing, Inc.
(773) 544-0817✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
US Environmental Testing / Northern Illinois Radon LLC
(630) 915-9434✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
White Glove Building Inspections
(630) 495-4555✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
WIN Home Inspection
(618) 534-3526✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
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ZIP codes in DeKalb County
Open a ZIP to see every county it touches. Where a ZIP crosses a county line, the percentage is the share of its land area inside DeKalb County.
60111601126011560129 (27%)60135 (96%)60140 (4%)60145 (95%)60146 (88%)6015060151 (25%)60152 (2%)60178 (93%)60511 (4%)60518 (25%)6052060530 (32%)60531 (38%)60548 (54%)6055060552 (81%)6055661068 (1%)
Illinois radon program
EPA lists IL Emergency Management Agency Radon Program (phone 217-782-4977) as the state contact. State programs can tell you about local test results, discounted kits, disclosure rules for home sales and credentialed professionals. Website: iema.illinois.gov/nrs/radon.html.
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Frequently asked questions
What is the EPA radon zone for DeKalb County, Illinois?
EPA's Map of Radon Zones puts DeKalb County in Zone 1 (highest potential): Predicted average indoor screening level above 4 pCi/L.
Do I need to test for radon in DeKalb County if the zone is low?
Yes. EPA says the zone map should not be used to decide whether a single home needs testing. Homes with high radon are found in every zone, and neighboring homes can test very differently. Testing is cheap and the only way to know your level.
How do I find a certified radon professional in DeKalb County?
We list 139 state-licensed radon professionals for DeKalb County on this page, each checked against the state's official list. You can also ask for free quotes with the form on this page.
How many ZIP codes are in DeKalb County?
22 ZIP codes have at least part of their land area in DeKalb County, based on the U.S. Census Bureau's 2020 ZIP Code Tabulation Area to county relationship file.
Free checklist · PDF
Radon Test Checklist
A one-page, step-by-step checklist for running a home radon test right the first time, and what to do with the number.
- Short-term vs. long-term test: which to use
- Closed-house conditions and where to place the kit
- What 2, 4 and 8 pCi/L mean and when to fix
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