---
title: "Daniel J. Coughlin, Title 5 System Inspector SI #303 | Title 5 Roster"
description: "Daniel J. Coughlin is a MassDEP-approved Title 5 System Inspector (SI #303) based in Methuen, MA. Approval expires June 30, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/daniel-j-coughlin-si303/
---

# Daniel J. Coughlin, Title 5 System Inspector (SI #303)

Daniel J. Coughlin is on the NEIWPCC list of MassDEP-approved Title 5 System Inspectors dated October 2, 2026.

* **SI number:** #303
* **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:** Methuen, MA
* **County:** Essex County

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