Region 1 - Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.
Region 2 - New Jersey, New York, Puerto Rico and the U.S. Virgin Islands.
Region 3 - Delaware, Maryland, Pennsylvania, Virginia, West Virginia, and the District of Columbia.
Region 4 - Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, and Tennessee.
Region 5 - Illinois, Indiana, Michigan, Minnesota, Ohio, and Wisconsin.
Region 6 - Arkansas, Louisiana, New Mexico, Oklahoma, and Texas.
Region 7 - Iowa, Kansas, Missouri, and Nebraska.
Region 8 - Colorado, Montana, North Dakota, South Dakota, Utah, and Wyoming.
Region 9 - Arizona, California, Hawaii, Nevada, and Pacific Islands and Tribal Nations subject to US law.
Region 10 - Alaska, Idaho, Oregon, and Washington.
ORD - Office of Research and Development.