Franklin County
Local NEHA certified Radon Measurement Specialists
Certified Radon Inspectors
NEHA Certified Radon Measurement Specialists
| Company | Inspector | Phone | City | County |
| Crackteam-Missouri, LLC | James Hudson | (636) 625-3554 | O'Fallon | Saint Charles |
| Cornerstone Building Inspections, dba Housemaster | Wesley E. Villhard | (314) 393-9543 | St Charles | Saint Charles |
| Alec Cody Enterprises LTD Inc., (ACE) | Tim Knight | (636) 978-9111 | St Peters | Saint Charles |
| Assisting Homebuyers Inspection Services | James Zaloudek | (314) 406-2848 | St. Charles | Saint Charles |
| Radon Guard | William H. Parr | (314) 566-5667 | Wentzville | Saint Charles |
| Crossroads Inspection Services, LLC | Rick Bryant | (636) 887-6316 | Wentzville | Saint Charles |
| Spruce Environmental Technologies | Trudy Y. Smith | (314) 471-2090 | Lake Sherwood | Warren |