Licensed Winnebago County Radon Testers
| Name | License # | Company | City | Phone | Web Site | |
| Lara Clauson | RNI2006201 | Know Radon Inc. | East Dundee | 888-972-3669 | Web Site | |
| Dean Cushing | RNI210210 | RCI Inspections LLC | Grayslake | 773-716-3560 | Web Site | |
| Lori Macy | RNI2015228 | Radaspec | Rockford | 815-871-7216 | ||
| Michael Musgrave | RNI2007210 | ALLIN Radon Detection | Sterling | 877-535-0990 | Web Site | |
| Jason Sword | RNIT2017221 | Sword Home Inspections | Forreston | 815-541-8933 |