What environmental issue can result from septic system failure?

The environmental issue that can arise from septic system failure is the contamination of groundwater. When septic systems do not function properly, they can leak untreated or partially treated sewage into the surrounding soil. This seepage can permeate the soil and reach the groundwater aquifers. Contaminated groundwater poses significant health risks as it can carry pathogens, nutrients, and harmful chemicals, which may eventually enter drinking water supplies or local water bodies. This contamination can lead to serious public health concerns, aquatic ecosystem damage, and long-term environmental degradation. Proper maintenance and usage of septic systems are crucial to preventing such failures and protecting groundwater resources.