Walla Walla County is located on the Columbia
Plateau and in the Blue Mountain region of southeastern Washington.
Its unusual name is from the Sahaptin Indian language and means "a
place of many waters." The original boundaries of Walla Walla County,
as created in 1854, included all the present counties of Washington
east of the Cascades. The present boundaries were created in 1875.
Risk and Protective Profile for Substance
Abuse Prevention for Walla Walla County, Profile
of Substance Use and Need for Treatment Services in Walla Walla County.
Source:
RDA.