Indiana Code Title 36. Local Government § 36-9-22.5-1

(1) An employee of a local health department who is designated by the local health department as having knowledge of onsite sewage systems sufficient to determine whether an onsite sewage system is failing.

(2) An individual who is certified by the Indiana Onsite Wastewater Professionals Association as an onsite sewage system installer or inspector.

(3) An individual listed by:

as having sufficient knowledge of onsite sewage systems to determine whether an onsite sewage system is failing.