C-NRPP Certified Radon Companies in Windsor

Every company holding current Canadian National Radon Proficiency Program certification that is based in Windsor, or that names Windsor in its own service area. Listed free, whether or not they know this page exists.

Two lists, because the difference is a fact and the alternative is a guess. The first is companies whose registered address is here. The second is companies based elsewhere in Ontario that state they cover this area. We do not assume that a firm in one town serves the next one over, so if you do not see enough names, the full Ontario list has everyone.

Based in the Windsor Area, 3

Their registered address with C-NRPP is in this area. The town on each card is the one they gave the registry.

Certified to Install the Fix

Advanced Basement Systems

Based in Windsor, Ontario · website
measurementmitigationcommercial measurementcommercial mitigation
Serves Southwestern Ontario (their own stated coverage)

Geo Construction

Based in Windsor, Ontario · website
measurementmitigationcommercial measurementcommercial mitigation

Windsor Radon

Based in Tecumseh, Ontario · website
measurementmitigation

What the Two Certifications Mean

C-NRPP certifies separately for measurement, finding out what a home reads, and for mitigation, installing the system that fixes it. Plenty of companies hold only one. If a test has come back high, you want a company on the first list above.

See also: the Windsor radon map, every certified company in Ontario, and what counts as a safe level.

Certification data from the Canadian National Radon Proficiency Program public registry, read on 5 September 2026. Service areas are each company's own words. Nothing on this page is paid for.