U.S. EPA
The Grand Lake Watershed is located within the jurisdictional boundaries of two seperate U. S. Environmental Protection Regional Offices. KANSAS and MISSOURI are located in EPA Region 7. EPA Region 7 offices are located at 901 N 5th Street, Kansas City, KS 66101 (800)2230425.
ARKANSAS and OKLAHOMA are located in EPA Region 6. EPA Region 6 offices are located at 1445 Ross Avenue, Suite 1200, Dallas, TX 75202. (800)8776063