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
  May 15, 2019
Granite State Certified Septic Evaluator Training Program
Our next Certified Septic Evaluators Traning Program will be held on Wednesday, May 15 (classroom) and Saturday, May 18, 2019 (field program and field exam) and required...
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