Services include communicable disease control programs, family health services, health education and promotion, and environmental health services. Services are offered to the community through three main service sites - Mayville, Jamestown, and Dunkirk.
Clinic services are available to the public in the forms of department-sponsored clinics, school-based clinics, travel clinics, and other specialty clinics at five sites. Clinics are offered for tuberculosis, immunization, and HIV, and STD testing. Services are available at low-cost or no cost to members of the public