Home > Explore Products > EPA’s National Stormwater Calculator

EPA’s National Stormwater Calculator

Region(s) of Study: U.S. States and Territories

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

View Product

About NCCOS

NCCOS delivers ecosystem science solutions for stewardship of the nation’s ocean and coastal resources to sustain thriving coastal communities and economies.

Stay Connected

Sign up for our quarterly newsletter or view our archives.

NCCOS Multimedia

Visit our new NCCOS Multimedia Gallery. 

Follow us on Social

Listen to our Podcast

Check out our new podcast "Coastal Conversations"