There are several federal public health resources available online. The following is a list of helpful links for searching information in this area, with links to their websites provided:
Agency for Health Care Research and Quality
Centers for Disease Control and Prevention
Health Resources and Services Administration
Maternal and Child Health Bureau, HRSA
Office of Disease Prevention and Health Promotion
Public Health Functions/HP 2010
Substance Abuse and Mental Health Services Administration
US Department of Health and Human Services