The N.H. Department of Enviromental Services' Subsurface Systems Bureau administers the laws, regulations and rules affecting septic systems within New Hampshire.  They are located at 29 Hazen Drive, P.O. Box 95, Concord, NH  03302-0095. They can be contacted at 603-271-3501 or jo-ann.mckenney@des.nh.gov.

NHDES Subsurface Systems Bureau Web Site

Chapter Env-Wq 1000 Subdivision and Individual Sewage Disposal System Design Rules

DES One-Stop Application & Approval Status

On-Site Wastewater Disposal System Installation Manual

List of Towns Requiring Approval of Septic Plans

Disposal of Backwash from Water Treatment Devices at Single Family and Duplex Residences  

Click here for: DES List of Fourth Order and Higher Streams for Purposes of Conducting Site Assessments of Developed Waterfront Property

Click here for the updated Site Assessment Fact Sheet.

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