Radon: How to Find a Contractor
Radon contractors can offer radon measurement (testing) or radon mitigation (fixing) and are oftentimes certified for both. Work with a radon measurement contractor when you want to test your home or building for radon. Work with a radon mitigation contactor when you have received a high radon test result and want to install a radon mitigation system.
The State of Wisconsin does not require contractors performing radon measurement or mitigation work to be state licensed or nationally certified. The Department of Health Services (DHS) recommends finding a radon professional through an Environmental Protection Agency (EPA)-recognized third-party credentialing organization that certifies radon professionals.
Currently, there are two such organizations: the National Radon Proficiency Program (NRPP) and the National Radon Safety Board (NRSB). There are nearly 150 radon contractors throughout Wisconsin who are certified with the NRPP or NRSB.
When a radon professional holds a nationally recognized certification, it means they:
- Adhere to national standards for system installation. These standards are in place to make sure that mitigation systems work properly to reduce radon levels.
- Hold a level of knowledge by participating in training courses, passing exams and receiving continuing education.
- Promise to comply with ethical standards set by certifying bodies.
- Are subject to accountability measures and can face disciplinary action for incorrect work.
Use the “Find A Professional” search function on each organization’s website to find a certified radon professional near you. Be sure to filter your search by the type of service needed (e.g., radon measurement vs. radon mitigation), since some professionals are only certified in one and not the other.
Follow these steps to find a contractor
- Navigate to the National Radon Proficiency Program (NRPP) or National Radon Safety Board (NRSB) websites.
- Use the dropdown to select if you are looking for a:
- “Certified Measurement Specialist” for radon testing, or
- “Certified Mitigation Specialist” for installing a radon mitigation system.
- Type in your zip code. You may be asked to enter your radius preference.
- Submit your search.
When the search results appear, you’ll see a number of professionals' names and contact information. We recommend contacting at least three companies for a cost estimate– that way you can make an informed decision on what is best for you.
Note: The NRPP is a larger organization than the NRSB. This is why most radon professionals in Wisconsin are certified with the NRPP. However, both organizations are recognized by the EPA for offering approved radon credentialing services.
Tips for working with a radon contractor
- Confirm they hold an active certificate by searching the National Radon Proficiency Program (NRPP) or National Radon Safety Board (NRSB) national databases.
- Ask what radon level the company consistently achieves after installation.
- Ask the radon professional to provide evidence of their certification or license and proof of insurance.
- Ask if a home visit will be conducted to determine the best mitigation approach.
- Request a written estimate and a contract that is signed by the professional and the homeowner.
- Ask if they follow ANSI/AARST standards of practice and if not, what standards they do follow.
- Ensure their communication meets your standards.
- Request photos of previous installation work.
- Ask for and check references and look for independent reviews. Many companies have books showing photos of their previous work.
For additional guidance on selecting and working with a contractor, visit the EPA Consumers Guide to Radon Reduction (PDF), which includes a helpful checklist on pages 5 and 6.
Questions?
Experts are available statewide to answer your questions and provide test kits to the general public. Get in touch with a radon expert by contacting your regional Radon Information Center or by calling 1-888-LOW-RADON (1-888-569-7236).