December 13, 2016: Mapping out death from opioids by type - heroin, synthetic, and natural - makes certain geographic data very clear. For example, states west of the Mississippi have the lowest death rate for synthetic opioids. Source data is from the CDC's WONDER database. The Washington Post article discusses the CDC data, sayng "the country is in fact dealing with multiple opioid epidemics right now — each with a distinct geographic footprint." A table of the raw data from WONDER/DCD is included.

Washington Post: Where opiates killed the most people in 2015