Keeping your septic system in good shape not only keeps your plumbing working, but also helps protect groundwater, local waterways, and the environment. If a septic system is neglected or starts to fail, untreated wastewater can enter the soil and nearby water, harming local ecosystems and public health. Knowing how your septic system affects the environment is an important part of being a responsible property owner . How Do Septic Systems Affect the Environment? Septic systems handle household ...