An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the
United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Important for you to know:
New to WDFN: daily data are now available in WDFN! Visit a Monitoring Location Page and scroll to the "Available data" section to graph daily data types. To learn more, read our announcement on the Water Data for the Nation blog.