The North Zone Office is located in High Ridge at the Dillon Plaza Shopping center. The telephone number for the North Zone Office is (636) 797-6407.
The East Zone Office is located on Windsor Harbor Road off Hwy. 61/67 in Imperial. The telephone number for the East Zone Office is (636) 797-6405.
The South Zone Office is located in Hillsboro on the campus of Jefferson College. The telephone number for the South Zone Office is (636) 797-6118.