---
title: "Ted P. Doucette, Title 5 System Inspector SI #4680 | Title 5 Roster"
description: "Ted P. Doucette is a MassDEP-approved Title 5 System Inspector (SI #4680) based in Littleton, MA. Approval expires June 30, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/ted-p-doucette-si4680/
---

# Ted P. Doucette, Title 5 System Inspector (SI #4680)

Ted P. Doucette is on the NEIWPCC list of MassDEP-approved Title 5 System Inspectors dated October 2, 2026.

* **SI number:** #4680
* **Approval expires:** June 30, 2028
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** Doucette Engineering
* **Based in:** Littleton, MA
* **County:** Middlesex County

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