Indiana Code Title 16. Health § 16-19-3-27.6

(1) has a particular design;

(2) consists of particular components;  and

(3) is installed or constructed in a particular way.

(1) A conventional septic system consisting of a septic tank and a gravel or stone soil absorption field.

(2) A chamber system in which wastewater is piped from the septic tank to a series of connected chambers backfilled with soil.

(3) A subsurface drip distribution system in which wastewater is pumped from the septic tank to a dose tank and then gradually delivered to drip laterals in the soil.

(4) An aerobic treatment unit in which oxygen is injected into the wastewater to accelerate the biological processes used to treat the wastewater before being discharged to a soil absorption field.

(5) A recirculating sand filter system in which wastewater flows from a septic tank to a pump chamber and then is recirculated through a sand filter before being discharged to a soil absorption field.

(6) An evapotranspiration system that includes a drain field having a watertight liner and in which wastewater, after entering the drain field, evaporates into the air.

(7) A constructed wetland system in which wastewater from a septic tank enters a wetland cell containing an impermeable liner, gravel, sand fill, and wetland plants that remove pathogens and nutrients from the wastewater before being discharged to a soil absorption field.

(8) A sand-lined system in which wastewater flows from a septic tank to a combined treatment and dispersal soil absorption field containing piping laterals surrounded by sand.

(1) the local health department of a county, city, or multiple county unit has issued a permit for construction or installation of a type of residential onsite sewage system;

(2) the use of the same type of residential onsite sewage system at a location in a different county, city, or multiple county unit has been approved by:

(3) all of the persons referred to in subdivision (2) attest that the same type of residential onsite sewage system, if constructed or installed at the location referred to in subdivision (2), would satisfy the requirements of the rule of the state department concerning residential onsite sewage systems;