Indiana Septic System
Indiana Septic System Regulations
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.