Radon testing and mitigation · state license lists

Got a radon number? Start here.

Put your result on EPA's scale, then hire from the state's own license list. Every business and every rule on this site links to the agency record behind it.

151mitigation businesses on the Illinois and Pennsylvania lists

233Colorado mitigation licenses

$895 to $3,000+published system prices

Hire from the state's list

Illinois

73mitigation businesses on the IEMA-OHS list, read October 15, 2026

Pennsylvania

78mitigation businesses on the DEP directory of October 1, 2026

Colorado

233active mitigation licenses on DORA's file, with expiry dates

Licensed mitigators who publish their price

7 businesses on the state lists print a price for a standard system on their own website. See every figure and its source.

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

Mock's Radon Reduction

Camp Point, IL

IEMA-OHS mitigation license RNM2009203

$1,300 to $2,200 system

Radon Reduction Systems Inc

Naperville, IL

IEMA-OHS mitigation license RNM98124, RNMT2017208 +1

$1,800 to $2,200 system

Stuedemann Radon Resolutions

Marseilles, IL

IEMA-OHS mitigation license RNM2010216, RNM20263459

from $1,100 system Radon mitigation systemsFoundation crack sealing

Airotox Radon Remediation Services

Lansdale, PA · Montgomery County

DEP mitigation certification 2741, 3109

from $995 system

R&R Radon Reduction

Pine Grove, PA · Schuylkill County

DEP mitigation certification 2893

$895 to $1,600 system

Home inspectors and radon

A standard home inspection leaves radon out; the radon test is an add-on that needs its own state license (Illinois) or certification (Pennsylvania). In Illinois 124 of 306 radon measurement professionals are also licensed home inspectors.

Radon guides

Read my radon result Check a license