Which of the following is prohibited within 300 feet of a well?

The correct answer indicates that a sewage pumping station is prohibited within 300 feet of a well. This regulation is in place to protect groundwater supplies from potential contamination. Sewage pumping stations can contain wastewater, which may include pathogens, chemicals, and other harmful substances. If these contaminants were to leak or spill, they could easily infiltrate the aquifer or well, posing significant health risks to humans and the environment.

The regulation surrounding the location of sewage pumping stations is particularly stringent because of the high risk associated with wastewater management. Proper distancing from wells helps to create a buffer zone that mitigates chances of contamination and ensures that the water quality remains safe for consumption and other uses.

While other options may also pose risks to groundwater, the specific regulation concerning sewage pumping stations reflects the need for careful consideration of how human waste management systems interact with drinking water sources.