Define 'groundwater contamination’ in relation to septic systems.

Groundwater contamination specifically refers to the degradation of groundwater quality due to the introduction of harmful substances. In the context of septic systems, this often occurs when untreated sewage, which includes pathogens, nutrients, and toxic compounds, seeps into the groundwater. This seepage typically happens when a septic system is not functioning properly, such as when there is a failure in the tank or drain field.

When the system fails, the untreated sewage can leak into the surrounding soil and subsequently reach the groundwater supply. This process significantly impacts the quality of the groundwater, posing health risks to humans and wildlife, especially if the contaminated water is used for drinking or irrigation.

Understanding this relationship is crucial for the safe management of septic systems and protecting community health, which is why recognizing the implications of untreated sewage on groundwater quality is a key aspect of septic system operations and regulation.