A septic system is an underground wastewater treatment system commonly used in rural areas where centralized sewage systems are not available. It consists of a septic tank that collects and treats household wastewater, allowing solids to settle at the bottom while liquids flow out to a drain field for further filtration into the soil. The septic tank typically requires regular maintenance, including pumping out accumulated solids every few years. Proper care ensures the system functions effectively, preventing backups and protecting the environment from contamination. Understanding how a septic system works is essential for homeowners to maintain their property and comply with local regulations.