How far must surface applications be from the edge of the spray area to protect the Edwards Aquifer?

The requirement for surface applications to be a certain distance from the edge of the spray area is crucial for protecting the Edwards Aquifer, which is a vital source of drinking water. The correct distance is set at 150 feet to ensure that any potential contaminants from surface applications do not reach the water table or flow into the aquifer through surface runoff.

This distance helps create a buffer zone that minimizes the risk of chemicals or pollutants from agricultural practices or landscaping treatments entering the aquifer. By establishing this 150-foot limit, regulatory agencies promote public health and environmental protection.

The other distances provided do not offer enough of a buffer for safe groundwater protection, highlighting the importance of adhering to established guidelines based on scientific assessments of the aquifer's vulnerability and the potential impacts of surface activities.