NEHA Certified Inspectors in Washington
(Certified for Radon Measurement)
General Radon Information
| Company | Inspector | City | County |
| Northwest Radon Services | Tim Suchla | Vancouver | Clark |
| Shaw Environmental, Inc. | Patrick Thomas Moore | Bothell | King |
| Cavalier Corporation | Warren J. Riddle | Mead | Spokane |
| Cavalier Corporation | Sylvia J. Riddle | Mead | Spokane |
| Advanced Radon Tech, Inc. | Mark S. Gerard | Spokane | Spokane |
| Advanced Radon Technologies, Inc. | David M. Gerard | Spokane | Spokane |
| Gold Seal Mechanical Inc. | Steven G Wilson | Spokane | Spokane |
| The House Inspectors, Inc. | Erich Prahl | Spokane | Spokane |
| Gold Seal Mechanical, Inc. | Chris Dixon | Spokane | Spokane |