A septic system is an underground wastewater treatment structure that comprises a septic tank and a drain field. The system treats domestic wastewater by separating the solids from the liquids and breaking down organic matter in the water using bacteria. Septic systems are commonly used in rural areas or locations where municipal sewage treatment facilities are unavailable.\n\nSeptic tanks come in different sizes based on the number of people living in a home, with larger ones being installed for homes with more occupants. In general, septic tanks should be pumped out every three to five years to prevent sludge buildup, which can lead to failure. Regular maintenance is also essential to ensure that the system functions properly; this includes inspecting pipes and components for damage or leaks.