National Service Center for Environmental Publications
- More than 7,000 in stock and 24,000 digital titles are available to search and retrieve, download, print and/or order from the National Service Center for Environmental Publications (NSCEP).
- http://www.epa.gov/nscep/

EPA Online Library System (OLS)
- Online catalog containing the holdings of EPA libraries.
- http://www.epa.gov/natlibra/ols.htm

Region 8 Technical Library
- Serving Colorado, Montana, North Dakota, South Dakota, Utah, and Wyoming. In Denver, Colorado. Provides technical information to support the work of EPA Region 8 staff and provides the public with environmental information resources.
- http://www.epa.gov/region8/library/index.html

Region 3 Library
- Serving Maryland, Pennsylvania, Rhode Island, Virginia, and West Virginia. In Fort Meade, Maryland.
- http://www.epa.gov/region03/rcei/

Atmospheric Sciences Modeling Division Library
- Provides information about the Library's collection, services, and policies. Located in Research Triangle Park, NC.
- http://www.epa.gov/asmdnerl/Library/index.html

Region 4 Library
- Serving Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina and Tennessee. In Atlanta, Georgia.
- http://www.epa.gov/region4/r4_library/index.htm

Andrew W. Breidenbach Environmental Research Center (AWBERC)
- Library located in Cincinnati, Ohio.
- http://www.epa.gov/oarmcinc/library.htm

Environmental Sciences Division
- Technical Research Center, Las Vegas, Nevada.
- http://www.epa.gov/nerlesd1/trc/home6.htm

Environmental Protection Agency - RTP Library
- The EPA-RTP library offers access to the online catalog, the technology transfer network, EPA testing methods, and EPA publications.
- http://www.epa.gov/rtp/library/

Environmental Science Center Library - Ft. Meade, MD
- Includes descriptions of library contents by category. Library is the environmental reference source for the Environmental Science Center and the following states in Region 3: DE, Washington DC, MD, PA, VA, and WV.
- http://www.epa.gov/region3/esc/library/

Region 10 Library
- Serving Alaska, Idaho, Oregon, the Puget Sound, and the state of Washington. In Seattle, Washington.
- http://yosemite.epa.gov/r10/omp.nsf/webpage/Region+10+Library+-+Home?OpenDocument

Legislative Reference Library
- Washington, DC. Includes copies or summaries of the legislation that created EPA and the statutes it enforces, Congressional Record summaries, and information on pending legislation.
- http://www.epa.gov/ocirpage/leglibrary/index.htm

Region 8 Environmental Information Service Center
- Serving Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming. In Denver, Colorado.
- http://www.epa.gov/region8/library/infocent.html

Region 9 Library
- Serving Arizona, California, Hawaii, Nevada, the Pacific Islands subject to U.S. law, and approximately 140 Tribal Nations. In San Francisco, California.
- http://www.epa.gov/region09/library/

Region 2 Library
- Serving New York, New Jersey, Puerto Rico, and the US Virgin Islands. In New York, New York.
- http://www.epa.gov/Region2/library/

Region 1 Library
- Serving Connecticut, Massachusetts, Maine, New Hampshire, Rhode Island and Vermont. In Boston, Massachusetts.
- http://www.epa.gov/region01/oarm/index.html

Gulf Ecology Division Library
- Gulf Breeze, Florida.
- http://www.epa.gov/ged/bld42.htm

U.S. EPA National Enforcement Investigations Center Library
- This website contains information about the National Enforcement Investigation Center (NEIC) and its activities related to environmental enforcment. It also has information regarding the NEIC organization, highlights, library information sources and publi
- http://es.epa.gov/oeca/oceft/neic/library1.html

OPPTS Chemical Library
- Office of Pollution Prevention and Toxics. Washington, DC.
- http://www.epa.gov/opptintr/library/

U.S. EPA Headquarters Information Resources Center
- The EPA Headquarters Information Resources Center provides reference assistance to the public and EPA staff.
- http://www.epa.gov/natlibra/hqirc/