Our Offices
Main District Office
Hach Bldg, Suite 400, 401 1st Street,
S.E.
Cedar Rapids, Iowa 52401-1825
Phone: 319-363-0091
Fax: 319-363-1990
TTY: 319-286-9258
Branch Office
Terra Bldg, Suite 670, 600 4th
Street
Sioux City, IA 51101
Phone: 712-255-6011
Fax: 712-252-2034
TTY: 712-258-4761