Region 5 Model for Estimating Pollutant Load Reductions
Note: In April 2022, EPA transitioned from the STEPL spreadsheet model to the online The Pollutant Load Estimation Tool (PLET) All supporting documentation and training materials for the Region 5 Model and STEPL are here during a temporary time of transition.
We encourage all users to explore PLET as a more efficient approach to your modeling needs. Please update your webpage bookmarks as this page will soon be retired.