Contact Us
By Telephone:Call our toll-free line Monday - Friday, between the hours of 8:00 am and 6:00 pm (ET) at 888-890-1995. For callers from Puerto Rico and Guam the CDX Help Desk can also be reached at 970-494-5500.
By E-mail:
Send e-mail correspondence to helpdesk@epacdx.net.
By Mail:
U.S. Environmental Protection Agency
C/O CGI Federal Inc.
12601 Fair Lakes Circle
Fairfax, Virginia 22033
Contact Form
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