Granite State Onsite Wastewater Association

A trade association of septic pumpers, designers, installers, evaluators, and consultants related to the onsite wastewater industry

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Upcoming events

12

May

Tuesday

Septic Evaluator Training Program May 12th & May 16th (2-day course)

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Advanced Onsite Solutions, LLC

Infiltrator Water Technologies

GSOWA Gold Member Affiliate

Eljen Corporation

GSOWA Gold Member Affiliate

News and Announcements

NHDES Env-Wq 100 Rule Revision Catalog

Oct 7, 2025

2025-09-19 Rule Revision Catalog

State of NH Land Resources Management Permitting Fees Increase eff. 7/1/2025

Jul 2, 2025

Please be aware that as of 7/1/2025, the State has increased the Land Resources Permitting Fees. You can read the email received from the State here: State Permitting Fees Increase 7.1.25

New List of Subsurface Field Inspectors-UPDATED 2/10/25

Feb 26, 2025

For those who may not have seen it yet, the Subsurface Systems Bureau map of regional inspectors has been replaced by a newly-created town-by-town list broken down into geographic regions of the...

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