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Granite State Designers and Installers Association is New Hampshire's trade association for those working with on-site subsurface wastewater disposal systems. This website provides background about the organization and useful information for homeowners such as the care and maintenance of septic systems and how to find a qualified septic designer, installer, and evaluator.  Professionals will find links to all rules and laws concerning septic systems as well as a complete listing of a calendar of events.

 News & Events
  November 25, 2014
GSDI Board of Directors Meeting
GSDI Board of Directors Meeting Executive Office 53 Regional Drive, Suite 1 Concord, NH 03301 4:30 pm
  December 9, 2014
GSDI Annual Meeting 2014
  March 16, 2015
2015 Spring Septic System Conference & Exposition
Attendee program and registration information will be made available after January 1, 2015. Exhibitor registration information will be made available in early Fall 2014....
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Welcome to Granite State Designers and Installers : Granite State Designers and Installers