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.
This information is provided for technical experts who intend to work directly with the database. Other users can retrieve information using the SEMS Search.
The SEMS tables in Envirofacts are organized into the subject areas shown below. Click on a subject area to view the tables.
