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Federal
2016-2018 NSDUH Substate Region Definitions
U.S. Department of Health & Human Services —
Use these maps and tables to understand the geographic boundaries used in the2016-2018 National Surveys on Drug Use and Health (NSDUH) substate estimates. The... -
Federal
2012-2014 NSDUH Substate Region Definitions
U.S. Department of Health & Human Services —
Tables and maps defining the substate regions for each state and the District of Columbia