EPA zone context: Montana includes extensive Zone 1 coverage, especially in mountain valleys and many western counties.
Watts Radon Testing & Mitigation is a dedicated radon services company serving Anaconda, MT. Services include radon testing, radon mitigation system installation. Works with slab foundations. Methods include sub-slab depressurization, heat recovery ventilation. Rated 5.0/5 on Google based on 27 reviews.
5.0 (7 Google reviews)
Licensed Provider: Rick Shaver
Certified Radon Services is a dedicated radon services company serving Billings, MT. Established in 2003. Services include radon mitigation system installation, mitigation system design, radon testing, radon measurement. Works with slab foundations. Methods include sub-membrane depressurization, heat recovery ventilation. Holds Certified Radon Mitigation Specialist and Certified Radon Measurement Professional certifications. Rated 5.0/5 on Google based on 7 reviews.
Licensed Provider: Joel B Beaudette
Advanced Radon Mitigation & Contracting Specialists, LLC is a dedicated radon services company serving Corvallis, MT. Services include radon mitigation system installation, mitigation system design, radon testing, radon measurement. Works with slab foundations. Holds Certified Radon Mitigation Specialist and Certified Radon Measurement Professional certifications.
Licensed Provider: Roger Martin
Martin's Maintenance, LLC is a dedicated radon services company serving Great Falls, MT. Over 20 years of experience. Services include radon mitigation system installation, mitigation system design, radon testing, radon measurement. Methods include heat recovery ventilation. Holds Certified Radon Mitigation Specialist and Certified Radon Measurement Professional certifications. Offers free estimates, licensed and insured.
Licensed Provider: Jay W. Gorder
5.0 (36 Google reviews)
Licensed Provider: Jennifer L Thorne
Safe Home Environmental, LLC is a contractor offering radon-related services serving Lolo, MT. Services include radon mitigation system installation, mitigation system design, radon testing, radon measurement. Works with crawlspaces. Methods include heat recovery ventilation. Holds Certified Radon Mitigation Specialist and Certified Radon Measurement Professional certifications. Rated 5.0/5 on Google based on 36 reviews. Offers real estate transaction testing.
Pure Air Solutions is a contractor offering radon-related services serving Missoula, MT. Services include radon mitigation system installation, mitigation system design, radon testing, radon measurement. Works with basements, crawlspaces. Methods include heat recovery ventilation. Holds Certified Radon Mitigation Specialist and Certified Radon Measurement Professional certifications. Offers free estimates. Provides a 1-year warranty on mitigation systems.
5.0 (56 Google reviews)
Licensed Provider: Joe A Engibous
Big Mountain Insulators, Inc. is a dedicated radon services company serving Whitefish, MT. Established in 1986. Services include radon mitigation system installation, mitigation system design. Methods include heat recovery ventilation. Holds Certified Radon Mitigation Specialist certification. Rated 5.0/5 on Google based on 56 reviews.
Radon levels vary house-to-house even in the same city. Testing your own home is the only reliable way to know your risk.
Many western counties are mapped Zone 1, so testing is strongly recommended in those markets.
Yes. Slab and basement ranch homes both need entry-point assessment when tests are elevated.
Most homeowners in Montana see mitigation quotes in the low-thousands, but the final cost depends on foundation type, fan location, and pipe routing complexity. A cost calculator can help you benchmark estimates before requesting bids.
Yes. A valid short-term or long-term test is the fastest way to confirm if mitigation is needed and to scope the right system design.
EPA recommends action at 4.0 pCi/L, and many homeowners choose to reduce levels even below that threshold. Montana includes extensive Zone 1 coverage, especially in mountain valleys and many western counties. ZIP-level lookup tools are useful for local context, but home testing is still required.
Look for current NRPP or NRSB credentials, ask for post-mitigation test expectations, and confirm local compliance details. Montana does not mandate separate state mitigation licensing; NRPP/NRSB credentials are commonly used for qualification.
Estimate likely project pricing by foundation type and system complexity.
Learn when and how to test, plus how to interpret pCi/L results.
See how state-level risk varies and what zone maps can and cannot tell you.
Check projected local risk by ZIP code before you request quotes.