Why Join

Membership in the Indoor Environments Association (IEA, formerly AARST) gives you access to exclusive educational and marketing content that will enhance member knowledge & career. Become part of the IEA community and connect with other members who are working together to increase public awareness, advocate for public policy, and grow their businesses.

Members Are Committed

Members work for change in radon policy, protect families from exposure, and aim to ensure that all who perform measurement and mitigation in their communities are  certified and working to the highest standards of practice.
Join today.


IEA consists of 1,000+ members across the US. Sixteen state and regional chapters offer ways to get involved – from CE to public awareness to policy advocacy.
IEA members are enrolled for free in their local chapter, where available.


Membership provides numerous perks for business and home. Members can access free Category-I continuing education towards NRPP Certification Renewal. Explore all of the benefits of IEA.

IEA offers numerous networking opportunities such as association and stakeholder meetings, chapter meetings, virtual meetups, and the Symposium. Participate with your industry colleagues on digital networking platforms,  the listserv, and our social media platforms including LinkedIn, Twitter and Facebook.

Members also enjoy The Radon Reporter and our monthly e-newsletter, Rn Biz to keep current.