---
title: "Robert E. Hannigan, Title 5 System Inspector SI #4892 | Title 5 Roster"
description: "Robert E. Hannigan is a MassDEP-approved Title 5 System Inspector (SI #4892) based in Milton, MA. Approval expires June 30, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/robert-e-hannigan-si4892/
---

# Robert E. Hannigan, Title 5 System Inspector (SI #4892)

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

* **SI number:** #4892
* **Approval expires:** June 30, 2028
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** Robert E Hannigan Associates
* **Based in:** Milton, MA
* **County:** Norfolk County

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