What is the distance guideline for separating public water supply lines from unlined evapotranspiration beds?

The distance guideline for separating public water supply lines from unlined evapotranspiration beds is based on the need to protect water quality and ensure the safety of the public water supply. Unlined evapotranspiration beds can potentially allow contaminants to seep into the surrounding soil and groundwater, which could directly affect nearby water supply lines if they are too close.

Setting a distance of 10 feet as a guideline helps create a buffer zone that minimizes the risk of contamination through lateral movement of water and helps protect the integrity of the water supply. This distance is recognized by regulatory agencies to ensure that any potential impacts from the evapotranspiration process do not jeopardize the safety of the drinking water.

The other distances stated as possible answers are either greater or less than what is established as a safe distance, making them less suitable for protecting public health and water supply.