In the National Strategy to Revitalize Environmental Public Health Services, the philosophy of the Centers for Disease Control states that organizational evaluations are needed to ascertain the current level of competence, methods of training, effect of training, effect of the essential service approach to environmental public health, relations between competencies and practices as they pertain to community-based need, information that reaches the environmental public health workforce, and effect of workforce-directed activities on the level of competence and job performance