• Envirofacts: An EPA site that allows users to search environmental materials and datasets, with an advanced search options as well.
  Allows searching for specific geographic regions, reports and maps.

• Wex: A public access law dictionary and encyclopedia from Cornell's School of Law. Contains specific information regarding environmental policies.

• Environmental terms: From the EPA's website. Incredibly thorough and also includes descriptions for policy keywords such BMP and other acronyms.

• ATSDTR Hazardous Substance Release and Health Effects Database: This is a database from the Agency for Toxic Substances and Disease Registry. Here you can search data sets, abstracts and a variety of other related sources.

• RCRA Online: An EPA database which stores publications and outreach material concerning all issues and topics around RCRA.