---
title: "Robert E. Johnson, Title 5 System Inspector SI #15145 | Title 5 Roster"
description: "Robert E. Johnson is a MassDEP-approved Title 5 System Inspector (SI #15145) based in Westford, MA. Approval expires February 1, 2029 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/robert-e-johnson-si15145/
---

# Robert E. Johnson, Title 5 System Inspector (SI #15145)

Robert E. Johnson is on the NEIWPCC list of MassDEP-approved Title 5 System Inspectors dated October 2, 2026.

* **SI number:** #15145
* **Approval expires:** February 1, 2029
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** Listed under own name
* **Based in:** Westford, MA
* **County:** Middlesex County

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