This paper reports an evaluation of a community-based approach to prev
ent underage sales of alcohol. The interventions focused on (a) enforc
ement of underage sales laws, (b) responsible beverage service (RES) t
raining and (c) media advocacy. The interventions were implemented in
three experimental communities located in California and South Carolin
a. Purchase survey data were obtained before and after the interventio
ns in each experimental community and in three matched comparison comm
unities. Logistic regression analyses of the purchase survey data far
the individual community pairs and for the combined communities showed
that sales to apparent miners were significantly reduced in the exper
imental sites. The findings indicate that these environmental interven
tions are promising prevention tools for communities that seek to redu
ce underage drinking.