Radon Testing CompaniesCanada — C-NRPP credentials and verification dates

Thunder Bay, ON, Canada

Radon testing in Thunder Bay

Latest credential check on this page: September 14, 2026. Each record carries its own date. Canadian sources and verification.

4 current C-NRPP testing credentials whose official record names Thunder Bay, Ontario. This is partial coverage of professionals with an address in this city, not a list of everyone who serves it.

A C-NRPP certification is not a provincial licence. Confirm the credential and ask whether the professional serves your building before hiring. Check a C-NRPP number.

Name / companyCityC-NRPP credentialServiceValid throughLast verified
Alan Cooke
Northern Home Designs
Thunder BayCRT-201728testingJuly 1, 2028September 14, 2026
Layla Miller
Stantec Consulting
Thunder BayCRT-202507testingJuly 1, 2028September 14, 2026
Matthew Falvo
TBT Engineering
Thunder BayCRT-202552testingJuly 1, 2028September 14, 2026
Ralph St. Jarre
Radon Safe Northwest Ltd.
Thunder BayCRT-201844testingJuly 1, 2027September 14, 2026
Fig. 1 — Thunder Bay, approximate. Pin marks the official Canadian Geographical Names Database city reference point, not a business address or service area.

Map source: Natural Resources Canada — Thunder Bay. Contains information licensed under the Open Government Licence – Canada.