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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
  March 16, 2015
2015 Spring Septic System Conference & Exposition
Our two-day conference is THE industry event of the year where you may earn all six of your continuing education contact hours good for the renewal of your NH  septic...
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Welcome to Granite State Designers and Installers : Granite State Designers and Installers