Licensed Winnebago County Radon Testers
| Name | License # | Company | City | Phone | Web Site | |
| Ron Boyer | RNIT2006214 | Precision Home Inspections | Byron | 815-234-7646 | ||
| Thomas Brain | RNI2002212 | Radon Testing Co. | Rockford | 815-397-2366 | Web Site | |
| Lara Clauson | RNI2006201 | Know Radon Inc. | East Dundee | 888-972-3669 | Web Site | |
| Mark S. Connely | RNIT2007206 | ProSpector | Rockford | 815-541-1541 | Web Site | |
| Gary Kreitlow | RNI2008203 | Reynold Consulting, Inc | Rockford | 815-289-9432 | Web Site | |
| Michael Musgrave | RNI2007210 | ALLIN Radon Detection | Sterling | 877-535-0990 | Web Site | |
| Bradley Rasmussen | RNIT2001208 | HomeTeam Inspections | Sycamore | 815-895-3840 |