Tuesday, August 4th, 2020

Indiana Septic System

indiana septic system

Indiana Septic System Regulations

Due to soil compaction from area glaciers existing 15,000 to 20,000 years ago, Indiana has a relatively high water table. This condition makes it hard for the Indiana septic system drain field to maintain enough oxygen to ensure that sufficient aerobic breakdown of solids can take place. Over time, this condition will cause failure of the septic system, first noticed by pooled water at the surface accompanied, of course, by the foul odor.

Indiana Septic System Design - Perimeter Drains

One septic system design rural Indiana residents have adopted over the years is more of a modification of the original, but none the less, considered by many an improvement. Known as "Perimeter Drains", the modification consists of a ditch around the septic drain field containing a pipe perforated at the bottom, back filled with gravel to about 6 inches from the top and covered with soil. Perimeter Drain is then provided an outlet at a lower elevation on the property, which allows excess water to drain off. This helps maintain a dryer aerobic soil area at the surface which facilitates operation of the drain field.

It's important to note here that Indiana State Code does not currently define Perimeter Drains, and therefore does not endorse them. The state requires more studies to ensure these drains do not cause additional untreated water to enter ditches and streams.

Indiana Septic System - Purdue University

Purdue University produced an excellent reference on septic system design and operation in "Obtaining a Septic System Permit".

Also see, "Indiana State Department of Health"