National Stormwater Calculator User's Guide for the Mobile Web-Based Application Version 3.2.0.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- National Stormwater Calculator User's Guide—Mobile Web-Based Application Version 3.2.0 (PDF)(106 pp, 6 MB, August 12, 2019, EPA/600/R-19/076)