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.
We currently partner with over 45 federal, state, and local governmental agencies, universities, river basin commissions, water authorities, power generators, nonprofit organizations, as well as private entities to provide relevant, unbiased scientific information. Please see our Connect page to contact us for more information.