Septic Tank Inspectors in New Hampshire
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Cities in New Hampshire
New Hampshire Septic Regulations
New Hampshire septic systems are regulated by the Department of Environmental Services (DES) Subsurface Systems Bureau under the Subsurface Disposal rules (Env-Wq 1000). Permits are required for the installation, alteration, and repair of subsurface wastewater disposal systems, and site evaluations are mandatory before approval.
- Subsurface wastewater permits are issued by DES and require a site evaluation and soil assessment.
- New Hampshire requires licensed designers and permitted installers for subsurface wastewater disposal system installation and major repairs.
- DES rules establish minimum setback distances from wells, surface waters, wetlands, and property lines for all subsurface systems.
- New Hampshire does not mandate a statewide time-of-transfer septic inspection, though lenders and some towns may require one.
- Systems must be designed to meet DES standards based on site and soil conditions, including percolation test results and vertical separation to seasonal high groundwater.
- DES maintains records of permitted systems — contact the DES Subsurface Systems Bureau for records before purchasing property.