---
title: "Michael O. Theroux, Title 5 System Inspector SI #14361 | Title 5 Roster"
description: "Michael O. Theroux is a MassDEP-approved Title 5 System Inspector (SI #14361) based in Agawam, MA. Approval expires June 30, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/michael-o-theroux-si14361/
---

# Michael O. Theroux, Title 5 System Inspector (SI #14361)

Michael O. Theroux is on the NEIWPCC list of MassDEP-approved Title 5 System Inspectors dated October 2, 2026.

* **SI number:** #14361
* **Approval expires:** June 30, 2028
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** Listed under own name
* **Based in:** Agawam, MA
* **County:** Hampden County

Source: https://neiwpcc.org/wp-content/uploads/2026/10/SI-Instate-10.2.2026.pdf (retrieved 2026-10-12)