What is the minimum setback distance from the edge of a drain field for down-gradient interceptor drains?

The minimum setback distance from the edge of a drain field for down-gradient interceptor drains is important for ensuring the effective functioning of the septic system and for protecting water quality. A setback distance of 30 feet helps to prevent the potential contamination of groundwater and ensures that any effluent discharged from the drain field does not negatively impact the interceptor drains. This distance allows for adequate separation to promote proper drainage and to mitigate the risk of surface or subsurface runoff carrying contaminants to nearby water sources.

Setback distances are determined based on health and environmental regulations, aiming to protect both public health and the ecosystem. Adhering to this guideline promotes effective treatment of wastewater and minimizes the risk of filter clogging or failure, contributing to the overall effectiveness of the septic system.