Data provided by the Washington State Health Care Authority (HCA).

Data from the Department of Health, who collects information on pregnancy and delivery in Washington State from birth certificates, and information on deaths in Washington State from death certificates.
Occurrence of birth in each residence county represents all births to residents of each county regardless of where the birth occurred.
Occurrence of death in each residence county represents all deaths to residents of each county regardless of where the death occurred.

Infant birthweight data obtained from United States Department of Health and Human Services (US DHHS), Centers for Disease Control and Prevention (CDC), National Center for Health Statistics (NCHS), Division of Vital Statistics, Natality public-use data 2016-2019, on CDC WONDER Online Database, October 2020. Accessed at http://wonder.cdc.gov/natality-expanded-current.html