OEP




The mission of the Sisseton Wahpeton Oyate, Office of Environmental Protection is to protect, preserve and enhance the environment for the health and safety of the people of the Lake Traverse Reservation. By capacity building, and the development and implementation of environmental policies and regulations, we strengthen the sovereignty of our Nation.


Contact Information
Phone Number 605-698-4998

Program Manager: Myrna Thompson

Mailing Information
P.O. Box 509
Agency Village, SD 57262

For more information you can go to the link below.
SWO OEP Link