EPA's Staff Directory contains the telephone numbers of most EPA employees. If they are someone who may be affiliated with EPA for only a short period of time, such as a contractor, grantee or a researcher, you may want to contact the EPA Region Office or the individual EPA program office or lab.
Search EPA's Staff Directory
To send a letter to a certain person, you will would need to add their name, and the appropriate mail code (listed in the Staff Directory) for the employee's office to the above address.
The main mailing address for EPA Headquarters in Washington, DC is:
Environmental Protection Agency
1200 Pennsylvania Ave NW
Washington, DC 20460