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RESOURCES

EPA National Stormwater Calculator

The National Stormwater Calculator (SWC) can be used to estimate the amount and frequency of rainwater runoff from sites anywhere in the United States. The calculator accounts for soil conditions, rainfall history, land cover, and more.

 

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EPA Stormwater Management Model

The Stormwater Management Model (SWMM) is part of EPA’s suite of water research tools. SWMM is a hydrology-hydraulic water quality simulation model used to simulate stormwater runoff quantity and quality in urban areas.  SWMM is highly technical and is best suited for those with working knowledge of the industry.

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US Climate Extremes Index (CEI)

This tool provides an index of the most extreme temperatures, precipitation events, and droughts from around the country to aid planners and policy makers in the adaptation process.

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Green Values Stormwater Toolbox

From a leading non-profit think tank, the Center for Neighborhood Technology, comes this updated version of a user-friendly "calculator" for measuring and comparing various stormwater management practices. The toolbox is easy-to-use, comprehensive, and adaptable.

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National Climate Change Viewer (NCCV)

The National Climate Change Viewer is meant to help forecast future changes in precipitation, temperature, and the water balance for any county or state in the United States.  The tool is useful when planning for climate resiliency and adaptation.

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  • Resource Types:
  • Calculators and Modeling
  • Getting Started Steps:
  • Map It
  • Plan It
  • Planning Process Steps:
  • Gather Data
  • Publisher(s):
  • EPA