Grundy County
Local NEHA certified Radon Measurement Specialists
Certified Radon Inspectors
NEHA Certified Radon Measurement Specialists
| Company | Inspector | Phone | City | County |
| Landauer, Inc. | Mark R. Salasky | (708) 755-7000 | Glenwood | Cook |
| RSSI 6312 West Oakton Street | Roger Marsh | (847) 965-1999 | IL | Cook |
| GlobeSpec | Myron G. Sonkin | (630) 690-5363 | Carol Stream | Du Page |
| Midwest Radon Detection, LLC | Paul J. Ybarra | (630) 553-8824 | Yorkville | Kendall |