Certified radon testers & mitigatorsEntry — verified 29 Aug 2026

Entry № RMS-17SS084

Stephen W. Sadler

Durridge Company

Last verified August 29, 2026. Methodology

Credential number
RMS-17SS084
Credential body
NRSB
Status
current Certified. Current in the source file.
Services
testing
City
Billerica
County
Not on the source file
State
Massachusetts
Phone
978-667-9556
Source
https://nrsb.org/find-a-pro/
Fig. 5 — Billerica, MA, approximate. Pin is the city on the official file, not a street address.

§ 5.1

Places on the source file

Claim or update this listing. A claim cannot add someone who is missing from the official file.