Fluoride concentrations in food, water, and even the air are key components of current dental caries preventive trends. Fluoride has a well-established beneficial effect on preventing dental cavities and is used in dentistry because it reduces the demineralizing effects of acids produced by cariogenic bacteria and speeds up the process of demineralization after acid attacks. Fluoride products must not be used in excess of the cario preventive dose. Therefore, these should be compared to the amount of iron consumed from various outside sources. Since drinking water is the main source, concentration needs to be assessed in both the community water delivery network and in wells. Prior to developing the Constanta County programmer for dental caries prevention, funded by the Ministry of Health and administered to the 20,000 children between the ages of 6 and 12, our survey was set up.Locales in Constanta County in order to provide the most accurate concentrations map possible. Fluoride concentrations were identified in areas that are likely to be subjected to fluorosis, as well as low concentration areas where treatment modalities of fluoridation are to be implemented. Additionally, it is crucial that not only dentists and pediatricians but also the parents of the children who, in collaboration with the doctors, can help ensure the best possible carioprophylaxis, are aware of the level of fluoride in their local drinking water. Thorium nitrate and fluoride anions combine to generate a stable non-ionizable molecule. The nitrate reacts with sodium alizarine sulphonate to generate a rosy-hued lac, which signifies the completion of the fluoride-thorium nitrate reaction once all fluoride anions have been subjected to complexing thorium. Dosing using a fluoride-selective electrode is a widely used ISO method nowadays. It is used at fluoride concentrations ranging from 0.1 to 10 ppm. A voltaic potential proportional to the difference in fluoride concentrations develops when the concentration of fluoride ions in the solution under inquiry is higher than that in the electrode. In order to measure multiple parameters simultaneously and with great precision for laboratory and chemical tests, a cyber-scan pH 2500 set was employed. Our study is the first to determine the amount of fluoride in drinking water over an entire county in Romania. The Oral Health Clinic at the Faculty of Dental Medicine and Pharmacy in Constanta has also offered to investigate the F content levels in mineral waters sold in Romania and has suggested that manufacturers label them. Only one of the 19 mineral waters that were examined had a concentration that was close to 1 ppm F, compared to some in Portugal where it reaches 14 ppm F, Bulgaria where it is 5 ppm, and France where it is 8.5 ppm. A regular user of these waters is more prone to get fluorosis.