EPA Region 3 (Mid-Atlantic) | Serving Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, West Virginia and 7 federally recognized tribes. U.S. Environmental Protection Agency (EPA). (n.d.). https://www.epa.gov/aboutepa/epa-region-3-mid-atlantic
Earl A. Greene et al. "Ground-Water Vulnerability to Nitrate Contamination in the Mid-Atlantic Region".Diarsipkan November 17, 2017, di Wayback Machine. USGS Fact Sheet FS 2004-3067. 2005. Retrieved April 25, 2013. Note: Although the locator map appears to exclude part of northwestern Pennsylvania, other more detailed maps in this article include all of the state. Often, when discussing climate, southern Connecticut is included with the Middle Atlantic.
Earl A. Greene et al. "Ground-Water Vulnerability to Nitrate Contamination in the Mid-Atlantic Region".Diarsipkan November 17, 2017, di Wayback Machine. USGS Fact Sheet FS 2004-3067. 2005. Retrieved April 25, 2013. Note: Although the locator map appears to exclude part of northwestern Pennsylvania, other more detailed maps in this article include all of the state. Often, when discussing climate, southern Connecticut is included with the Middle Atlantic.
