---
title: "Peter J. Lyons, Title 5 System Inspector SI #13583 | Title 5 Roster"
description: "Peter J. Lyons is a MassDEP-approved Title 5 System Inspector (SI #13583) based in Marshfield, MA. Approval expires September 1, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/peter-j-lyons-si13583/
---

# Peter J. Lyons, Title 5 System Inspector (SI #13583)

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

* **SI number:** #13583
* **Approval expires:** September 1, 2028
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** Listed under own name
* **Based in:** Marshfield, MA
* **County:** Plymouth County

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