C-NRPP Certified Radon Companies in London
Every company holding current Canadian National Radon Proficiency Program certification that is based in London, or that names London 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 London Area, 6
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
EXP Service Inc.
measurementmitigation
Serves London and Surrounding Area (their own stated coverage)
MITIGAIR
measurementmitigationcommercial measurementcommercial mitigation
Serves Ontario (their own stated coverage)
Certified to Measure Only
Guoyan Liu
Based in London, Ontario
measurement
JAM (2005) Enterprises
measurement
Serves London (their own stated coverage)
T. Harris Environmental Management Inc.
measurementcommercial measurement
Serves London (their own stated coverage)
VIP Properties Management Ltd.
measurement
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 London 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.