Licensed Jo Daviess County Radon Testers
| Name | License # | Company | City | Phone | Web Site | |
| David Barr | RNI96029 | The Home Inspectors Plus Inc. | Clinton | 563-243-8854 | ||
| Mark S. Connely | RNIT2007206 | ProSpector | Rockford | 815-541-1541 | Web Site | |
| Michael Musgrave | RNI2007210 | ALLIN Radon Detection | Sterling | 877-535-0990 | Web Site |