Granite State Designers & Installers Association
www.gsdia.org


N.H.  Department of Environmental Services
Subdivision & Individual Sewage Disposal System Design Rules
http://www.des.state.nh.us/rules/env-wq1000.pdf


U.S. Environmental Protection Agency
(septic system information for homeowners and professionals)
http://cfpub.epa.gov/owm/septic/home.cfm


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