NEHA Certified Inspectors in Washington
(Certified for Radon Measurement)
General Radon Information
| Company | Inspector | City | County |
| Shaw Environmental, Inc. | Patrick Thomas Moore | Bothell | King |
| Cavalier Corporation | Warren J. Riddle | Mead | Spokane |
| Cavalier Corporation | Sylvia J. Riddle | Mead | Spokane |
| Gold Seal Mechanical, Inc. | Chris Dixon | Spokane | Spokane |
| Advanced Radon Tech, Inc. | Mark S. Gerard | Spokane | Spokane |
| Gold Seal Mechanical Inc. | Steven G Wilson | Spokane | Spokane |
| Spokane Tribal Natural Resource | Twa-le Abrahamson | Wellpinit | Stevens |