---
title: "Walter B. Hermenau, Title 5 System Inspector SI #4545 | Title 5 Roster"
description: "Walter B. Hermenau is a MassDEP-approved Title 5 System Inspector (SI #4545) based in Freetown, MA. Approval expires June 30, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/walter-b-hermenau-si4545/
---

# Walter B. Hermenau, Title 5 System Inspector (SI #4545)

Walter B. Hermenau is on the NEIWPCC list of MassDEP-approved Title 5 System Inspectors dated October 2, 2026.

* **SI number:** #4545
* **Approval expires:** June 30, 2028
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** Hermenau Engineering
* **Based in:** Freetown, MA
* **County:** Bristol County

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