A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater (sewage) flows for basic sewage treatment. Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primary treatment").

A septic tank is an underground and watertight container made of concrete, polyethylene or fibreglass. It provides primary wastewater treatment with the help of naturally occurring forces and bacteria that break down solids and organic material.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.

A septic tank is a system that treats wastewater from homes and businesses that are not connected to a main sewage system. Septic tanks are typically installed in rural areas or low-income urban areas where traditional sewer systems are not feasible.