Whitewater, MO

ZIP code 63785 serves the rural community of Zalma in Bollinger County, southeastern Missouri. The Castor River is a prominent natural feature of the area, alongside its wooded and agricultural landscape. Regional outdoor landmarks include Castor River Conservation Area and the Castor River Shut-Ins in Amidon Memorial Conservation Area, where granite formations meet river pools. Local services are concentrated in Zalma.