The U.S. Government is closed. This site will not be updated; however NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit www.commerce.gov. For the latest forecast and critical weather information, visit www.weather.gov

The U.S. government is closed. This site will not be updated; however, NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit commerce.gov

For the latest forecasts and critical weather information, visit weather.gov.

EPA’s National Stormwater Calculator

A downloadable application that estimates the annual rainfall and frequency of runoff from a specified area located within the United States (including Puerto Rico). Estimates are based on local soil conditions, land cover, and historic rainfall records.  

 Aquaculture application: This software aids shellfish farmers in analyzing local rainwater runoff rates in efforts to site shellfish leases with a decreased risk of closure due to stormwater runoff.

Contributing PartnersEPA

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