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.


Click the photo below  to view Chris Albert's presentation on Nitrogen, Septic Systems, Great Bay and Why it Matters


The latest from the NH Office of Professional Licensure and Certification about the licensing of septic evaluators in NH!

 The NH Office of Professional Licensure and Certification has recently set up the following website for the program. The administrative rules to run the program are currently under development.



 2nd Training Now Scheduled!

GSDI Septic Evaluator Training Program

Our next Certified Septic Evaluators Traning Program will be held on Tuesday, July 17  (classroom) and Saturday, July 21, 2018 (field program) and required written exam given on the morning of Tusday, July 31.

The day-long classroom session will be held at the Grappone Conference Center/Courtyard by Marriott in Concord, NH.  The field program will be held at Homemakers Health located in Rocheter, NH where GSDI previously installed a demonstration system. The written exam will be given at a time to be announced between 8:00 a.m. and 1:00 p.m. at the NHDES headquarters in Concord.

The cost to participate is $750.

Click here to register online and pay with a credit card or check.

Click here for the program flyer. 

Questions?  Call GSDI at 603-228-1231 or email us by clicking here.

Find a Professional
Or click here to use our advanced search
 >Membership Information
 >Become a Member
Member Login:
Welcome to Granite State Designers and Installers : Granite State Designers and Installers