Cesspool vs. Septic Tank in Hattiesburg, MS: Key Differences and Legal Status

The terms cesspool and septic tank are often used interchangeably by homeowners, but they describe fundamentally different systems with very different legal statuses. If you own an older property in Hattiesburg or the surrounding Pine Belt that predates modern septic code, understanding which system you have — and whether it is legally compliant — is essential.

What Is a Cesspool

A cesspool is an underground pit — typically concrete block or stone, sometimes simply an excavated hole — into which raw sewage flows directly from the house. There is no biological treatment chamber, no effluent separation, and often no liner. Raw sewage seeps directly into the surrounding soil from the pit walls and bottom.

Cesspools were common in Hattiesburg and Pine Belt properties built before World War II, and some survived into the 1960s before code enforcement became consistent. In rural areas of Forrest and Lamar County, a small number of properties with very old improvements may still have cesspool-style systems.

Legal Status in MS

MS regulations require proper two-stage treatment — tank plus drainfield — for on-site wastewater treatment. Raw sewage pits that discharge untreated waste directly to soil are not compliant with current MDEQ regulations. Homes with cesspools are typically required to upgrade to a compliant system when the cesspool fails, when the property is sold, or when a permit is pulled for other improvements.

Identifying What You Have

If your home was built before 1960, or if you have no documentation of a permitted septic system, the only definitive way to determine what underground waste system you have is a professional investigation. During a service call, a technician can locate the system and identify its construction type.