Using mixed methods, we study unrecorded consumption and segregated populations’ consumption patterns in wine and spirit producing micro-regions near the Hungarian border and of a high alcohol-attributable mortality. The study delineates segregated and non-segregated communities. Aim is to estimate the level of unrecorded consumption and the prevalence of problematic substance use (low-quality alcohol, binge drinking, illicit drugs, designer drugs, sedatives / sleeping pills). The following methods are used: In-depth interviews with employees of commercial units, nightclubs and other competent persons; Small sample survey on consumption habits, drug substitutes, sources of drug supply, etc.; Qualitative (focus group) research with competent NAV (National Tax and Customs Administration) staff. The research is carried out with the help of university students, in the framework of student research camps.