Technical Abstract: In northeastern Indiana, premature septic system failure (less than one year from installation) has led to county specific state legislation and a series of new protocols for describing soils for septic systems on a series of end moraines. The objective of this study was to compare the loading rate based on field measured saturated hydraulic conductivity (LRm) across a toposequence on the Wabash moraine to the estimated loading rate (LRe) based on soil morphological properties. Saturated hydraulic conductivity measurements were determined by a compact constant head permeameter at five landscape positions, at four depths (surface horizon, upper argillic horizon, transition zone between the argillic horizon and till parent material, and till). Results showed that for all depths, the LRm was slower than LRe. Results from this study suggest that the current method of using soil morphological properties to determine the loading rate may overestimate the ability of the soil to properly disperse septic system effluent. The impact of this research is to inform the scientific community and regulators about potential problems associated with current septic system installation regulations.