4.8 (217 Google reviews)
Certified RMP, RMS
Radon Pros in Washington
15 contractorsEPA zone context: Washington includes mixed Zone 1, Zone 2, and Zone 3 counties, with higher predicted potential in several inland and eastern regions.
Certified Professional
4.8 (3553 Google reviews)
Certified RMP
Certified Professional
Certified RMP
AC
Aspect Consulting, a Geosyntec Company
Licensed Provider: Nathan Dickey
Testing Specialist•Seattle, WA
5.0 (1 Google reviews)
Certified RMP
4.9 (15 Google reviews)
Certified RMP
Certified Professional
Certified RMP, RMS
UA
US Army Corps of Engineers Walla Walla District
Licensed Provider: Kevin N Tureman
Testing Specialist•Walla Walla, WA
Certified Professional
Certified RMP
5.0 (1 Google reviews)
Certified RMP
4.3 (16 Google reviews)
Certified RMP
4.7 (12 Google reviews)
Certified RMP
5.0 (1 Google reviews)
Certified RMP, RMS
Certified Professional
Certified RMP
Certified Professional
Certified RMP
4.4 (7 Google reviews)
Certified RMP
Certified Professional
Certified RMP
Data provided by Google Maps
Popular Cities for Radon Mitigation in Washington
Other areas with radon contractors
Metro Areas in Washington
What to Do Next
Three steps to address radon in your Washington home.
Frequently Asked Questions: Radon in Washington
Testimonials
Recent homeowner results in Washington
Examples of homeowners who tested, mitigated, and confirmed lower radon levels in Washington.
“Radon levels were 8.2 pCi/L before the install and 0.6 on the follow-up test. The quote matched the scope and the crew finished in one day.”
Outcome
Reduced from 8.2 pCi/L to 0.6 pCi/L
Rachel M.
Seattle, WA
“We compared two certified companies here and picked the one that explained the crawlspace plan clearly. Our monitor stayed below 1.5 the week after the system went live.”
Outcome
Post-install readings stayed below 1.5 pCi/L
Chris D.
Spokane, WA
“The site helped us find a contractor fast during escrow. They tested, installed mitigation, and documented the re-test so closing stayed on schedule.”
Outcome
Testing, mitigation, and re-test completed before closing
Patricia L.
Federal Way, WA
About Radon in Washington
EPA Zone Summary: Washington includes mixed Zone 1, Zone 2, and Zone 3 counties, with higher predicted potential in several inland and eastern regions.
Radon levels vary house-to-house even in the same city. Testing your own home is the only reliable way to know your risk.
Radon Guides for Washington
Articles and guides to help you understand radon risk and make informed decisions.
What Does Radon Mitigation Cost? A Homeowner's GuideRadon Levels by State: Where Is Radon Most Common?What Radon Level Is Dangerous?How to Choose a Radon Mitigation Contractor
Cornerstone Guides
Radon testing & monitoring products for Washington
Start with a low-cost test kit, or set up continuous monitoring after mitigation.
Test Your Home
Radon test kits from $10
Monitor Continuously
Digital radon detectors
DIY Supplies
Manometers, sealants & more
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State Resources for Washington
Radon mitigation cost in Washington
Estimate likely project pricing by foundation type and system complexity.
Radon testing guide for Washington homes
Learn when and how to test, plus how to interpret pCi/L results.
Radon levels and EPA zones in Washington
See how state-level risk varies and what zone maps can and cannot tell you.
ZIP-level radon risk in Washington
Check projected local risk by ZIP code before contacting contractors.
All radon guides
Browse testing, mitigation, maintenance, and foundation guides.
Radon mitigation near me
Find nearby mitigation contractors by ZIP code distance.
Radon products for Washington homeowners
Compare top-rated test kits, monitors, and mitigation fans.
Browse radon services
Explore testing, mitigation, system design, and commercial radon services.
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