- Region 2
 - Superfund site information for New Jersey, New York, Puerto Rico and U.S. Virgin Islands. - Region 3
- Superfund site information for Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, and West Virginia.
- Region 4
- Superfund site information for Mississippi, Tennessee, Alabama, Georgia, Florida, Kentucky, South Carolina, and North Carolina.
- Region 5
- Superfund site information for Illinois, Indiana, Michigan, Minnesota, Ohio, and Wisconsin.
- Region 6
- Superfund site information for Arkansas, Louisiana, New Mexico, Oklahoma, and Texas.
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