Objectives: To study the possible effects of the industrial environment in confectionery factory and flour Mills on the oral cavity of workers in these factories, and to assess the current oral health status and treatment needs among those workers. Methods: 300 workers from both factories were included in the survey and completed a questionnaire on their personal data, working years in the Factory/Mills, personal habits, oral hygiene habits and dental visits within last year. Information on oral health status was collected by clinical examinations, Dentocult SM and Dentocult LB were used to measure Streptococcus Mutans and Lactobacillus count. Results: In both groups the working years is positively correlated with the DMFT (p < 0.001), furthermore in the Sweet factory workers there is a statistically significant positive correlation between working years and the increase of plaque index. Conclusions: Although the research results showed a relation between working in Sweet factory and Flour Mills (as occupational hazardous environment) and the worsened oral health condition among these workers, it also has been clear that there are other factors involved in their oral health status, as their socio-economic status, oral health knowledge, attitudes and behavior, and the degree to which workers are restricted to using protective measures (when available).