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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.

Registration is now open for the 2019 GSDI Spring Septic System Conference & Expo which will be held on Monday, March 25 and Tuesday, March 26, 2019 at the Doubletree by Hilton Manchester Downtown in Manchester, NH. 

Click here to learn more about the tentative program and to register online using a credit card or a check sent under separate cover. 

Click here to view, download and print the tentative program and registration form.


Exhibitor registration is open for the expo. 

Click here to download, review and print off the PDF of the exhibitor registration form. 

Click here to register online as an exhibitor using our secure PayPal portal or you may indicate that you will pay by check. 

http://gsdia.org
 News & Events
  March 25, 2019
2019 GSDI Spring Septic System Conference & Expo
Registration is now open for the 2019 GSDI Spring Septic System Conference & Expo which will be held on Monday, March 25 and Tuesday, March 26, 2019 at the Doubletree by...
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