The 3 Core Functions of Public Health are Assessment, Policy Development and Assurance. The 10 Essential Public Health Services describe the public health activities that all communities should undertake, and are categorized under the 3 Core Functions:

• Assessment –- 1) Monitor health status to identify and solve community health problems; 2) Diagnose and investigate health problems and health hazards in the community 
•  Policy Development — 3) Inform, educate and empower people about health issues; 4) Mobilize community partnerships and actions to identify and solve health problems; 5) Develop policies and plans that support individual and community health efforts 
• Assurance — 6) Enforce laws and regulations that protect health and ensure safety; 7) Link people to needed health services and assure the provision of health care when otherwise unavailable; 8) Assure a competent public and health care workforce; 9) Evaluate effectiveness, accessibility and quality of personal and population–based health services
• All 3 Core Functions — Assessment, Policy Development and Assurance — relate to the final Essential Public Health Service — 10) Research for new insights and innovative solutions to health problems.