EPA’s National Stormwater Calculator (SWC) is a desktop application that estimates the annual amount of rainwater and frequency of runoff from a specific site anywhere in the United States (including Puerto Rico). Estimates are based on local soil conditions, land cover, and historic rainfall records.
National Stormwater Calculator
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Current drought conditions, as well as forecasts, mapped out for the United States and Puerto Rico. Soil moisture, streamflow and...READ MORE