Private Sewage Disposal

A permit application is required when the septic tank is replaced or where a major component of the system is removed or added.

A popular type of private sewage disposal system in Illinois used by many homeowners is designed to treat sewage and then discharge treated wastewater to the surface of ground rather than below the surface where the water is absorbed.

Over 25% of Illinois households use on-site sewage treatment systems to treat wastewater.