Environmental

NH DES requires subsurface disposal systems (septic systems) to be designed to handle the property's wastewater based on:

AThe property's square footage only
BThe number of bedrooms, which determines estimated sewage flow✓ Correct
CThe age of the existing structure
DThe property's proximity to a water body

Explanation

NH DES designs septic system requirements based on the number of bedrooms in the home, which is used as a proxy for the number of occupants and daily sewage generation. More bedrooms require larger systems. This is a key factor in both new construction and additions that increase bedroom count.

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