What Is a Sewage Cesspool?

Ever wondered how people managed household waste before modern sewer systems? Meet the cesspool, a simple yet effective solution that’s been around for centuries.

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Think of it as a large underground pit designed to handle wastewater and waste solids in homes with no connection to a municipal sewer system. While they’ve become rare today, you can still find them in older homes, providing a straightforward, no-frills way to manage waste.

What Is a Cesspool Sewer System?

A cesspool sewage system is a basic underground structure that receives and stores wastewater and sewage from homes or small properties. It consists of a holding tank, usually of concrete or stone, buried in the ground.

How Does a Cesspool Sewage System Work?

The working process is quite simple. Wastewater flows from the house into the cesspool, where it separates into solid and liquid waste. Solids settle at the bottom, while the liquid waste seeps out through the tank’s perforated walls into the surrounding soil. Unlike a septic system, which has a dedicated tank to separate solid and liquid waste before moving liquids to a leach field or drain field, a cesspool allows all waste types to mix in one tank, which then releases the liquid into the ground.

A cesspool requires regular maintenance to prevent it from overflowing or clogging. Periodic pumping is essential to clear out the solid waste that collects at the bottom, as buildup can lead to sewage backups or soil contamination. The frequency of pumping depends on factors like household size, tank size and soil type, but most cesspools need servicing every few years to work correctly.

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Why Would You Pick a Cesspool Over a Septic System?

While septic systems have largely replaced cesspools, there are a few reasons some homeowners may still choose a cesspool:

• Simple design.

  Cesspools simply have a holding tank buried underground. For small properties or seasonal homes, they can be a quick solution for managing waste without the complexity of a full septic system.

• Lower installation costs.

  Cesspools can be less expensive to install than septic tanks, particularly in cases where properties are too remote or challenging for a septic system’s leach field or drain field to work properly. Their installation often requires less land and can sometimes be completed faster.

• Older home infrastructure.

  Many older homes already have cesspools installed. Upgrading these systems to modern septic tanks or connecting to a municipal sewer system could be costly, so some homeowners opt to maintain their existing cesspools.

Cesspool Maintenance

Proper maintenance is essential to keep a cesspool running smoothly. Regular pumping is necessary to clear solid waste and prevent the tank from overflowing. Generally, cesspools need to be pumped out every three to five years, but more frequent service may be required in cases where the system handles a large amount of wastewater or if soil conditions impede drainage. Many homeowners schedule routine inspections to detect potential issues like cracks in the tank walls or blocked perforations that slow drainage.

Environmental Regulations and Concerns With Cesspools

Cesspools can pose environmental risks, especially in areas with high water tables, sensitive soil types or proximity to bodies of water. Without a leach field to filter waste, improperly maintained cesspools may allow bacteria or harmful substances to seep into groundwater. Some states have enacted laws to phase out older cesspools due to these risks. In regions with strict environmental regulations, a septic system or connection to a municipal sewer might be the only option available.