Introduction: Dental caries occurs due to the demineralization process from the interaction of microorganisms. The demineralization process can be inhibited by regular administration of fluoride to the teeth. Fluoride is important to increase remineralization which it can stimulates, repair, and protect dentinal enamel. This mechanisms can against acid to avoids dental caries. Fluoride levels in drinking water can affect fluorine intake received by individuals. Geographically, there are various of fluoride levels in drinking water sources. This affects the frequency of dental caries until fluorosis can occur. This study aims to determine the correlation between levels of fluoride consentration in drinking water sources (PDAM water, village piped water and well water) with caries index of the community of Bugbug Village, Karangasem District.

Method: This study used an observational analytic design with a cross sectional approach. The location of PDAM water sampling, village piped water and well water is in one of the houses of the Bugbug Village and the location of dental caries examination in the respondent, namely in the Head Office of the Bugbug Village Karangasem Sub-District Karangasem Regency. The observation of dental conditions was carried out on 96 men of 26-65 years old. Result: Based on the results of the research, the level of fluoride in PDAM water is relatively low, village piped water and well water are classified as moderate. The respondent’s average DMF-T index is 2.15 which is low in the caries level. The Chi-Square test results obtained a value of p=0.04 (p<0.05).

Conclusion: The conclusions of this study, there is a significant correlation between levels of fluoride consentration based on water sources with the caries index.