In this work the authors have examined through the survey, the prevalence of smoking, alcohol consumption and drug abuse among the school children and youth. Subjects in this research were 208 pupils in Primary school and 232 pupils in Secondary school. It has been found that in the group of Primary school children 0.9% smoke, 5.83% consume alcohol and 0.9% use narcotics. Out of total number of subjects from Secondary school 27.97% smoke, 28.81% consume alcohol and 10.59% use narcotics. The problem is especially prominent among the boys and girls of the last two years of Secondary school: 42.86% smoke; 41.35% consume alcohol and 13.53 use narcotics.

In this research the authors have examined the quality of drinking water in schools by the microbiological and physico-chemical analyses of water samples from 140 schools in the region of ten municipalities of Zenica-Doboj Canton (Bosnia and Herzegovina). It is found that 18.57% of samples in the microbiological analysis, and 80.26% of samples in physico-chemical analysis, did not meet the standards prescribed for drinking water. Comparing the data in the statistic reports of health institutions and registration lists for infectious diseases in this area with the incidence of intestinal infections in the Region, the authors reached the conclusion that the incidence of intestinal infectious diseases and hepatitis A does not correlate to percentage of impure drinking water samples. This could be explained by lack of the sufficient and consistent registration of the infectious diseases which comes under the law.