Great Lakes Sediment and Nutrient Reduction Program


Region 5 Model

Region 5 Model is an Excel workbook that provides an estimate of sediment and nutrient reduction from the implementation of agricultural and urban BMPs. Region 5 Model does not estimate load reductions for dissolved phosphorus. 

Spreadsheet Tool for Estimating Pollutant Load (STEPL)

Spreadsheet Tool for Estimating Pollutant Load (STEPL) calculates nutrient and sediment loads from different land uses and the load reductions that would result from the implementation of BMPs. STEPL estimates reductions at the watershed basis.  

Soil Surveys

Soil Surveys furnish soil maps and interpretations needed in giving technical assistance to farmers and ranchers; in guiding other decisions about soil selection, use, and management; and in planning research and disseminating the results of the research. They are also used in educational programs about soil use and conservation. Current and out of print survey listings are also available by state.

National Stormwater Calculator

EPA’s National Stormwater Calculator is a software application that can be used to estimate the annual volume of stormwater treated by the installation of green infrastructure or other nature-based solutions. Information on the National Stormwater Calculator and access to the model is available online at