How to Select a Mitigation Contractor

​​A guide to selecting a professional, standards‑based mitigator
​Choosing a radon mitigation contractor is about finding someone who follows national standards, explains their design clearly, and earns your trust through transparency—not pressure. A qualified contractor will base their bid on real diagnostics, describe how the system will work in your home, and answer questions in plain language. 
​This guide helps you understand what professionalism looks like, what red flags to avoid, and how to feel confident in the contractor you select
​​1. Confirm National Certification
​​A qualified radon mitigator must hold one of the two national credentials:
  • NRPP – Radon Mitigation Specialist (RMS)
  • NRSB – Radon Mitigation Specialist
​This is the only certification level qualified to perform the diagnostics required to design a mitigation system.
​Require:
​The certified RMS must be physically present at your home to conduct diagnostics before preparing any bid.
​​2. Verify Utah Contractor Licensing
The State of Utah requires radon mitigators to hold a valid state contractor license, which provides:
  • insurance
  • bonding
  • business registration
  • regulatory oversight
​Ask for:
  • Utah contractor license number
  • Proof of liability insurance
3. Require compliance with All EPA ANSI/AARST standards
​A qualified mitigator must comply with all EPA ANSI/AARST soil gas measurement and mitigation standards, including:
  • diagnostic requirements
  • system design requirements
  • installation practices
  • post‑mitigation testing
  • performance verification
  • the national mitigation threshold of 4.0 pCi/L
​​4. Verify the Contractor Completes On‑Site Diagnostics Before Developing a Mitigation Plan
A certified Radon Mitigation Specialist must perform on‑site diagnostics before preparing a mitigation plan and the plan must remain separate from the mitigation contract.
A mitigation plan prepared without diagnostics is not compliant with national standards.
​A mitigation plan cannot be created from:
  • photos
  • floor plans
  • a phone call
  • a “standard system” template
​Diagnostics must include:
  • pressure field extension testing
  • evaluation of foundation type
  • identification of suction point locations
  • routing and discharge feasibility
  • fan sizing considerations
​If diagnostics are not performed, the bid is not valid.
​​5. Require a Written, Standards‑Based Mitigation Plan
​A professional plan should include:
  • diagnostic findings
  • system design description
  • fan type and location
  • discharge location
  • sealing plan
  • electrical requirements
  • warranty terms
  • total cost
​Important:
​The mitigation bid and plan is not a contract.
​The contractor must provide a contract separate from the bid and plan. You should only sign a contract after reviewing the mitigation plan and confirming it reflects the diagnostics and complies with national standards.
​​6. Require a Post‑Mitigation Test Using a CRM
​After installation, the mitigator must perform a post‑mitigation radon test using a Continuous Radon Monitor (CRM).
​The test must be conducted by a certified:
  • Radon Measurement Field Technician (RMFT), or
  • Radon Measurement Professional (RMP)
​You should receive written results.
​7. Watch for Red Flags
Walk away if you encounter:
  • no national certification
  • no Utah contractor license
  • refusal to perform diagnostics
  • “standard system” pricing
  • pressure to sign a contract immediately
  • no CRM post‑test
  • claims that standards are “optional”
A qualified mitigator will never rush you or minimize standards.
​8. Choose the Professional Who Follows Standards and Respects Your Home
A trustworthy mitigator will:
  • explain diagnostics clearly
  • provide credentials without hesitation
  • prepare a standards‑based bid
  • answer questions calmly
  • perform a CRM post‑test
  • offer a clear warranty
Your goal is not the cheapest bid — it’s the most competent, standards‑based professional.