- AirCheck
 - Radon test kits for homeowners and professional home inspectors. - APA Lab
- Provides consumers with a kit to determine their household's risk for radon gas.
- National Safety Products, Inc.
- Offers radon test kits for the home.
- Niton Corporation
- Offers equipment, kits and software for testing concentrations of radon, lead, and other heavy metals in paint, soil, dust, and air.
- Radon Solutions, Inc.
- Offering EPA approved test kids as well as information on health risks and air and water removal.
- Radon-Ease
- Learn about radon and its health effects. Also purchase radon testing supplies or radon warranties.
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