GroundRosterWilliam Dufresne***Licensed
| Name | William Dufresne*** |
| License number | 01192 |
| License type | Septic System Designer |
| License status | Active — NH DES Designer/Installer roster |
| Location | Hampton, New Hampshire 03842 |
| Phone | (978) 475-3555 |
Request a quote from William Dufresne***
What this license covers
- Design: licensed to size and lay out a septic system for a specific site and soil condition.
How to verify this license
We publish this listing exactly as it appears in New Hampshire's official licensing records; we do not vouch for the business itself. Before hiring, look up license #01192 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: NH DES - Septic System Designers & Installers, last checked 2026-08-16. Verify at the official source.
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