---
title: "Philip A. Colosi, Title 5 System Inspector SI #15011 | Title 5 Roster"
description: "Philip A. Colosi is a MassDEP-approved Title 5 System Inspector (SI #15011) based in Middleton, MA. Approval expires April 1, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/philip-a-colosi-si15011/
---

# Philip A. Colosi, Title 5 System Inspector (SI #15011)

Philip A. Colosi is on the NEIWPCC list of MassDEP-approved Title 5 System Inspectors dated October 2, 2026.

* **SI number:** #15011
* **Approval expires:** April 1, 2028
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** Listed under own name
* **Based in:** Middleton, MA
* **County:** Essex County

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