Using survey data from approximately 35 residents in each of 66 neighborhoods from 2 cities in a Southern State, this study attempted to provide an indicator of drug activity independent of arrest data. The approach taken is that while drug arrest data are not likely to be synonymous with the level of drug activity within a community, they may be indicative of activity that is most harmful to the community. The dependent variable in the study was arrest rates for drug trafficking. Neighborhood residents were treated as informed observers of their neighborhoods to obtain a survey measure of visible drug trafficking. The findings suggest that arrest rates for drug trafficking are reasonably valid indicators of the relative level of visible drug trafficking among neighborhoods. They also provide evidence that drug trafficking arrest rates correspond very highly with residents’ reported levels of visible drug trafficking in their neighborhoods. The finding also indicate that drug trafficking arrest rates are not significantly affected by the level of neighborhood disadvantage once the level of visible drug trafficking is statistically controlled. The empirical support of drug arrest data can be important for further development of the understanding of how community characteristics are related to crime and informal social control of crime. Appendix and references