Fluoride Concentration In Water Research Articles

β-carboline-based turn-on fluorescence chemosensor for quantitative detection of fluoride at PPB level.

A novel β-carboline-based chemosensor, having an acidic NH proton that leads to fluoride-induced deprotonation involving a vivid color change from colorless to yellow is described. The absorption spectrum of the chemosensor in acetonitrile has a peak at 375 nm, which changes to 428 nm with the gradual addition of only fluoride in the solution with a clear isosbestic points at 357 nm and 392 nm. More interestingly, the chemosensor gives a turn-on type of fluorescence at 554 nm in the presence of fluoride. Further it was found that the sensor is highly selective towards fluoride over other anions including chloride, bromide, iodide, nitrate, borate, perchlorate and can quantitatively detect fluoride at ppb level with a limit of detection of 0.02 mg/ L or 20 ppb. The chemosensor was successfully demonstrated to assess the fluoride concentration in the tap water.

Surface modified exfoliated graphite as a novel adsorbent for de-fluoridation of drinking water

Excessive fluoride concentration (>1 mg l−1) is responsible for dental and skeletal fluorosis. Out of the several fluoride removal methodologies available for de-fluoridation of drinking water, the present studies focused on the adsorption technique. The surface modification of exfoliated graphite was achieved by impregnating it with alumina by wet-chemical method. It was further subjected to physico-chemical characterizations such as Raman spectroscopy, SEM, TGA, XRD, point of zero charge etc. The batch adsorption studies of the adsorbent were conducted while varying the pH, adsorbent doses, contact time and initial fluoride concentrations. It followed the second order kinetics model and Langmuir model fitted well during the adsorption process shows the monolayer adsorption at lower fluoride concentration. However, the D-R model reveals that the adsorption of fluoride is due to the physical adsorption at higher fluoride concentration. The alumina impregnated exfoliated graphite could effectively remove fluoride to less than 0.01 ppm when the initial fluoride concentration in water was 10 ppm. Moreover the equilibrium pH achieved with the present adsorbent is favorable for drinking purpose.

Community level defluoridation of groundwater with limestone derived adsorbent

Fluorosis is a worldwide, chronic degenerative disease caused by excessive level of fluoride in drinking water, mostly impacting rural, resource poor communities. Success of any technological solution to this problem, by reducing fluoride in water to safe level, is contingent on its feasibility to be implemented under resource limited circumstances for extended periods. Keeping these constraints in mind, we have developed a method to adsorb fluoride using surface modified limestone, using a simple and scalable process. The adsorbent was prepared using crystalline calcium carbonate, calcium chloride and monobasic sodium phosphate as the main ingredients. Surface and elemental analyses showed that fluoride constituted up to 3.8% of the surface of the saturated adsorbent. Kinetic data showed that the diffusional resistance was a rate limiting step to water defluoridation. Pilot scale operation of the process in a rural tenement with local help to prepare the adsorbent and treat 700 l of groundwater each day for 4 months was demonstrated. During this period the average fluoride concentration of the feed water was 7.1 ppm, and was reduced to 1.0 ppm by the treatment. We also show that the saturated adsorbent could be regenerated by acid wash followed by surface modification.

Low-to-moderate fluoride exposure, relative mitochondrial DNA levels, and dental fluorosis in Chinese children

BackgroundThe alteration of mitochondrial DNA (mtDNA) content contributes to many diseases, however, little is known about its effect on the prevalence of dental fluorosis (DF). ObjectivesWe conducted a cross-sectional study to investigate the association of low-to-moderate fluoride exposure with relative mtDNA levels in relation to DF in children. MethodsWe recruited 616 resident children, aged 7–13 years, randomly from low-to-moderate fluoride areas in Tianjin, China. We measured the fluoride concentrations in drinking water and urine using the national standardized ion selective electrode method, and determined the relative levels of mtDNA using a quantitative real-time polymerase chain reaction assay. The association among fluoride exposure, relative mtDNA levels, and the prevalence of DF were examined using multivariable linear and logistic regression models. We also performed stratified and mediation analyses. ResultsThe relative mtDNA levels of participants in the DF group were significantly lower than in the non-DF group (0.95 ± 0.44 vs. 1.12 ± 0.45, P < 0.001). In the adjusted models, we found that a 1 mg/L increment in water fluoride concentration was associated with a 0.10-unit decrease in circulating relative mtDNA levels (95% CI: –0.14, −0.06) and a 2.85-fold increase (95% CI: 2.01, 3.92) in moderate DF prevalence. A 1 mg/L increment in urinary fluoride level was associated with a 0.12-unit decrease in circulating relative mtDNA levels (95% CI: –0.14, −0.09) and a 1.85-fold increase (95% CI: 1.39, 2.39) in moderate DF prevalence. Stratified analysis indicated a weaker positive association of DF prevalence with fluoride exposure, while a stronger inverse relationship with relative mtDNA levels in boys than in girls. Assuming causality, we estimated that circulating mtDNA levels mediated 13.0% (95% CI: 5.2, 28.7%) and 9.6% (95% CI: 4.7, 18.5%) of the estimated effect of a 1 mg/L increment in water fluoride and urinary fluoride on prevalence of moderate DF, respectively. ConclusionsGender potentially modifies the associations of DF prevalence with relative mtDNA levels and low-to-moderate fluoride exposure. The reduced circulating mtDNA levels may partly mediate the elevated prevalence of moderate DF in children under such exposure.

Leaching Treatment of Discarded Waste Cathodes in Aluminum Electrolysis

An industrial experiment was carried out by classifying the waste cathodes of aluminum electrolytic cells in Shanxi Province and investigating the effect of particle size and temperature on the leaching of soluble fluoride. It was discovered that NaF was the main dissolvent and could be effectively dissolved by four-stage leaching at 348 K and that the soluble fluorine could be decreased to the limit for hazardous solid waste. After the leaching of discarded water, the fluoride concentration in the final water was enriched to 17.69 g/L, and the effective enrichment of fluoride ion was realized.

A Tale of Two Water Supplies in China: Finding Practical Solutions to Urban and Rural Water Supply Problems.

Access to safe drinking water is among the 17 United Nations sustainable development goals. As the largest developing country, China has confronted large challenges to providing safe and sufficient drinking water to its population of 1.4 billion under the conditions of limited water sources and ubiquitous water contamination. This Account outlines these challenges as well as the practical solutions implemented by Chinese water professionals. We first provide a general introduction of the water supply in China. Next, we describe the main challenges of water source shortages and source water contamination. The practical solutions developed by Chinese water professionals are the core part of this Account, to which we have devoted ourselves to and contributed in some issues and cases. The water supply in China is a binary system that reflects the gap between urban and rural communities. Both urban and rural water supplies have been subject to water source shortages and contamination. Water shortages are mainly solved by long-distance water transportation projects. Urban water utilities generally pay attention to organic matter, ammonia, algae, and chemical spills in source water while also focusing on micro-organisms and disinfection byproducts in tap water. Micro-organisms are a widespread concern for rural water supplies, whereas arsenic, fluoride, and ammonia are an endemic concern in some rural communities. Investment in updating of treatment processes significantly benefits urban water supplies, and advanced treatment of ozonation and biologically activated carbon processes are now commonly used to ensure that strict drinking water quality standards are met. However, this is not the case for rural water supplies, where expensive advanced treatment is not affordable. Thus, improving rural water supplies requires approaches such as searching for sources with better water quality, using automated ultrafiltration instruments, or connecting to urban water supply distribution systems. For rural areas with high concentrations of arsenic or fluoride in source water, specific adsorbents are a practical way to help farmers. Similar challenges will be encountered elsewhere in the world; therefore, the practical solutions applied in China will be useful to other countries in different stages of development.

Forecast optimal fluoride concentration data in drinking water according to the ambient temperature in Golestan, Iran

AbstractControlling fluoride concentrations in drinking water at optimal levels could be effective in preventing certain negative health effects in humans. This study investigated optimal fluoride concentrations in potable water in Golestan province, according the ambient temperatures in the province. The study used data on fluoride concentrations in drinking water supplied by the Water and Wastewater Company of Golestan Province. The annual mean maximum temperatures were extracted from a website that recorded daily ambient temperature. The optimal value of fluoride in drinking water for each county of Golestan province was calculated by the Galgan and Vermillion formula. The results show that all of the counties should contain fluoride concentrations ranging from 0.73 to 0.766 milligrams per liter (mg/L) according to the calculation formula, while fluoride concentrations were instead reported to range between 0.23 and 0.53 mg/L by the Water and Wastewater company. In addition, according to World Health Organization (WHO) recommendations, the concentrations of fluoride in potable in all of the cities in Golestan province fall below the WHO standard. In conclusion, we suggest that the fluoride concentrations in Golestan province's drinking water should be taken into account by the appropriate authorities and that optimal fluoride concentrations in drinking water according to ambient temperatures be set to avoiding negative health impacts.

Physical and chemical characteristics of thermal springs in the Waterberg area in Limpopo Province, South Africa

The Limpopo Province in South Africa is richly endowed with thermal springs. Some have been developed for recreational, tourism or other purposes, while a number remain completely undeveloped. If the full economic potential of springs can be realised in a sustainable manner, they could make a substantial contribution to the local or even regional economy. The optimal use of a thermal spring is largely dependent upon its physical and chemical characteristics. This article focuses on the temperature and chemical features of 8 selected thermal springs located in the southern (Waterberg) region of the Limpopo Province, namely Warmbaths, Loubad, Vischgat, Die Oog, Rhemardo, Lekkerrus, Libertas and Buffelshoek. All of these springs are of meteoric origin, with water temperatures ranging from 30°C to 52°C. The mineral composition of the thermal waters reflects the geological formations found at the depth of origin. Changes in land use that occurred over the past few decades have apparently had no impact on the physical and chemical properties of the thermal spring waters. This effect may, however, become evident at a later stage due to a time lag in the migration of contaminants. The fluoride concentration of water from seven of the eight springs (all except Loubad) does not conform to domestic water quality guidelines and makes the water unfit for human consumption. Unacceptably high values of mercury were detected at Libertas. It is recommended that strict monitoring of the concentration of fluoride and other potentially harmful elements should be mandatory whenever the thermal spring water is used for bottling, domestic or full-contact recreational purposes.

Reduction of Fluoride in Water Phase by Micro-Nano Bubble Pretreatment Process.

Fluoride is important to aquatic environment and health aspects, and the optimal fluoride concentration in water is below 1 mg/L. In this study, the micro-nano bubble pretreatment was applied to remove fluoride ions in the water phase. The pH control by calcium hydroxide (Ca(OH)₂), and coagulation processes with poly aluminum chloride (PAC), aluminum sulfate (Alum), F900 and two kinds of polymer named as A-polymer and A430P polymer were applied for the pretreated wastewater. In results, the combination of PAC and A430P polymer with micro-nano bubble pretreated wastewater showed a higher fluoride removal than the case of other combinations. In chemical oxygen demand (COD) removal, the combination of Alum and A430P polymer with micro-nano bubble pretreated wastewater showed the best removal efficiency (64.6%) while the COD removal without pretreatment was 71.4% for fluoride and 57.2% for COD.

White Teeth and Healthy Skeletons for All: The Path to Universal Fluoride-Free Drinking Water in Tanzania

Fluorosis has been prevalent in the great East African Rift Valley (EARV) since before this region was given a name. In the Tanganyika days, Germans reported elevated fluoride concentrations in natural waters. In the 1930s, the clear relationship between high fluoride level and mottling of teeth was established. Since then, the global research community has engaged in the battle to provide fluoride-free drinking water, and the battle is not yet won for low-income communities. An applicable concept for fluoride-free drinking water in the EARV was recently presented, using the Kilimanjaro as a rainwater harvesting park. The Kilimanjaro concept implies that rainwater is harvested, stored on the Kilimanjaro mountains, gravity-transported to the point of use, eventually blended with natural water and treated for distribution. This article provides a roadmap for the implementation of the Kilimanjaro concept in Tanzania. Specifically, the current paper addresses the following: (i) presents updated nationwide information on fluoride contaminated areas, (ii) discusses the quality and quantity of rainwater, and current rainwater harvesting practices in Tanzania, (iii) highlights how low-cost water filters based on Fe0/biochar can be integrating into rainwater harvesting (RWH) systems to provide clean drinking water, and (iv) discusses the need for strict regulation of RWH practices to optimize water collection and storage, while simplifying the water treatment chain, and recommends strict analytical monitoring of water quality and public education to sustain public health in the EARV. In summary, it is demonstrated that, by combining rainwater harvesting and low-cots water treatment methods, the Kilimanjaro concept has the potential to provide clean drinking water, and overcome fluorosis on a long-term basis. However, a detailed design process is required to determine: (i) institutional roles, and community contributions and participation, (ii) optimal location and sizing of conveyance and storage facilities to avoid excessive pumping costs, and (iii) project funding mechanisms, including prospects for government subsidy. By drawing attention to the Kilimanjaro concept, the article calls for African engineers and scientists to take the lead in translating this concept into reality for the benefit of public health, while simultaneously increasing their self-confidence to address other developmental challenges pervasive in Africa.

Defluoridation of Drinking Water by Activated Carbon Prepared from &amp;lt;i&amp;gt;Tridax Procumbens&amp;lt;/i&amp;gt; Plant (A Case Study of Gashaka Village, Hong L. G. A., Adamawa State, Nigeria)

Water is an essential element for the sustainability of human life on earth. Thus, portable drinking water is scarce and not readily available to all. Rural communities consume contaminated water and take ill periodically, which later results in epidemics. Contamination of drinking water may be caused by natural sources or industrial effluents due to domestic, agricultural and industrial activities. One of such contaminants is fluoride which is a salt of the element fluorine. Several treatment technologies for removing fluoride from groundwater have been investigated. This study focused on providing potable drinking water with fluoride level within the limit specified by the World Health Organization (WHO) to the people of Gashaka village. To achieve this, fluoride concentration and some physical properties in the water sample were determined. Subsequently, treatment of the sample by herbal means using activated carbon prepared from the stem of Tridax procumbens was carried out to prevent or minimise the effects of fluoride on human health such as skeletal fluorosis, dental fluorosis, fractures in bones, immune deficiency, cancer and other diseases caused by high concentration of fluoride in water since it possesses properties capable of greatly reducing fluoride concentration. The experimental result shows that fluoride concentration in the sample obtained was 2.3 mg/l which exceeds the 0.7 mg/l - 1.2 mg/l range recommended by WHO. The effective contact time for fluoride removal was found to be 6 hours while the maximum dose of activated carbon for the effective removal of fluoride concentration in 100 mg of water was found to be 1.05 g which removed 85.6%. However, subsequent addition of the activated carbon tends to increase fluoride concentration in the sample.

Monitoring and health risk assessment of fluoride in drinking water in Babol, Mazandaran Province, Iran

Because of high variations in fluoride concentration and many contaminated areas, Iran has been known as an interesting country regarding different fluoride studies. However, researches on fluoride concentration and its effects in northern strip of Iran are limited; moreover, risk assessment studies have been neglected in these areas. Therefore, this study focused on the measurement and risk assessment of fluoride in water supplies of villages around Babol County in north of Iran. Therefore, this descriptive cross-sectional research was performed in the city of Babol, Iran, 2017. Eighty water samples were taken from 40 wells in the rural areas (40 and 40 samples in cold and warm seasons). The SPANDS method was used for the measurement of fluoride concentration. The non-carcinogenic risk of fluoride was assessed in four age groups (infant, children, teenager and adult). The risk of dental and skeletal fluorosis was counted based on the international standard. From all villages (n = 24), respectively, 4 and 3 villages in cold and warm seasons had proper fluoride concentrations according to the WHO standard; fluoride concentration of other villages was lower than the WHO minimum standard of. Any observable risk of dental and skeletal fluorosis in all studied villages for the whole age groups was not observed; the HQ of all the villages was lower than 1 except for Kalhu Dasht because its HQ was higher than 1 in infants and children in cold season. Infant and children of this village were exposed to risk of dental fluorosis. In northern areas of Iran, not only there is not a risk of dental or skeletal fluorosis, which is related to high concentration of fluoride, but also there is a risk of dental decay due to low fluoride concentration in water drinking water. However, this hypothesis needs to further study. © 2019 Desalination Publications.

Assessment of fluoride intake from drinking water and toothpaste in 3-year-olds: Preliminary results in Belgrade, Republic of Serbia

Background/Aim. Fluoride has beneficial effect on dental caries prevention and enables high hardness of enamel. However, fluoride intake above optimal levels can have adverse effects on teeth and bones, especially in young children during the period of intense growth and teeth development. The aim of this study was to assess fluoride intake from water and toothpaste among 3-year-old children in Belgrade, Serbia, in the municipalities of Vracar and Novi Beograd. Methods. A questionnaire for the parents (n = 40) was used to provide information on the water consumption (tap and/or bottled water) and the brand of toothpaste used by children as well as the frequency of tooth brushing and the amount of toothpaste during brushing. Fluoride concentrations in water and toothpaste samples were determined electrochemically by using fluoride-selective electrode. Fluoride intake was estimated through a mathematical model commonly used by the U.S. Environmental Protection Agency. Results. The obtained results indicate no significant difference in daily fluoride intake through drinking water and toothpaste in 3-year-old children in Vracar (n = 19) compared to Novi Beograd (n = 21) (p &gt; 0.05). However, all estimated fluoride levels (0.089?0.625 mg/day) are significantly lower than the optimal daily intake level for caries protection (0.7 mg/day for children up to 4 years, FNB-USA National Institute of Medicine) and two to six times lower than tolerable upper fluoride level for the children of same age (1.3 mg/day, FNB-USA National Institute of Medicine). Furthermore, calculated daily fluoride intake per kilogram body weight confirm very low fluoride intake by water and toothpaste in children of investigated municipalities in Belgrade, being significantly below the recommended an adequate intake (0.05 mg/kg/day, EFSA). Conclusion. This preliminary study has shown that daily fluoride intake in 3-year-olds is lower than tolerable upper fluoride level, even not sufficient for the prevention of dental caries.

Fluoride concentration of bottled water and public water in Lebanon.

People in Lebanon turned to bottle water consumption because of its poor public water quality. In general, fluoride is known as dental caries preventive. A study in 1986 and two other national surveys in 1994 and 2004 showed that the concentration of fluoride in public Lebanese water was insignificant for the prevention of dental caries (less than 0.3 mg/L). The aim of the study was to measure the fluoride concentration in the highest selling and known commercial brands for bottled water in Lebanon, as well as to assess their effectiveness regarding prevention of dental caries. Fluoride has a notable therapeutic effect but in small doses that fluoride can be found in drinking water. Analysis using an absorptiometry of 625nm and another technique using an Orion electrode of 9609 BN have shown the low content of fluoride in the Lebanese waters (less than 0.3 mg/l). Strategies have recently been evolved based on fluroide supplementation (if the results turn negative) to reduce the index of caries in LEBANON.

PHYSICOCHEMICAL ANALYSIS OF GROUND WATER AND SURFACE WATER IN BUNDI REGION, RAJASTHAN, INDIA

The present study has been focused on analysis of physicochemical parameters (pH, Turbidity, Alkalinity, Total Hardness, Total dissolved solids, Conductivity, Chloride, Sulfate, Fluoride content) in major surface water and ground water bodies of Bundi Region. All results were compared with the standard limits as per WHO guideline for drinking water. The deterioration in the quality of water could be accounted to rapid urbanization. The result of present work reveals that surface water and ground water collected from selected sites showed alkalinity, except surface water of site II and IV whereas parameters such as turbidity, total solids, total hardness, chloride, sulfate, fluoride content values were high at site III and IV, while in case of conductivity site III showed highest degree of occurrence indicating adverse impact of anthropogenic activities in Bundi.

The Effect of Water Fluoride Concentration on DMFT Index in Vardar Population in Macedonia

The aim of this study is to determine the correlation between the DMFT index of 12-year-old children and the concentration of fluorine in drinking water from the populated areas where children live. Material and method: In the examination, 85children were enrolled, out of 2 central and 2regional primary schools, at which the DMFT index was determined. The children live in 2 different cities and 2 different villages. Four water samples were taken from the examined area to determine the fluorine concentration by using the electrochemical method using the pH/ISE Meter-Thermo-Orion with a special F-electrode (Thermo Orion Ion Plus Fluoride Electrode) at the Institute for public health. Spearman's method was used to determine the correlation between the specified variables. Results: The total number of children in the examined sample was 85, out of which45 were male and 40 were female. The average DMFT index in this group of children was 2.75 with a standard deviation of ±2.56. Maximum concentration of fluorine in drinking water of 0.39ppmF was determined in the village Vinicani, while the minimum (0.17ppmF) in the city Veles and (0.20 ppmF) in the village Melnica. Correlation of the DMFT index in children from the Vardar region and the concentration of fluorine in the drinking water has a negative, indirect correlation, with the value of the coefficient r=-0.393. Conclusion: The correlation between the DMFT index and the concentration of drinking water is a negative, indirect and correlation is highly significant

The Effect of Water Fluoride Concentration on DMFT Index in Vardar Population in Macedonia

The aim of this study is to determine the correlation between the DMFT index of 12-year-old children and the concentration of fluorine in drinking water from the populated areas where children live. Material and method: In the examination, 85children were enrolled, out of 2 central and 2regional primary schools, at which the DMFT index was determined. The children live in 2 different cities and 2 different villages. Four water samples were taken from the examined area to determine the fluorine concentration by using the electrochemical method using the pH/ISE Meter-Thermo-Orion with a special F-electrode (Thermo Orion Ion Plus Fluoride Electrode) at the Institute for public health. Spearman's method was used to determine the correlation between the specified variables. Results: The total number of children in the examined sample was 85, out of which45 were male and 40 were female. The average DMFT index in this group of children was 2.75 with a standard deviation of ±2.56. Maximum concentration of fluorine in drinking water of 0.39ppmF was determined in the village Vinicani, while the minimum (0.17ppmF) in the city Veles and (0.20 ppmF) in the village Melnica. Correlation of the DMFT index in children from the Vardar region and the concentration of fluorine in the drinking water has a negative, indirect correlation, with the value of the coefficient r=-0.393. Conclusion: The correlation between the DMFT index and the concentration of drinking water is a negative, indirect and correlation is highly significant.

The Effect of Water Fluoride Concentration on DMFT Index in Vardar Population in Macedonia

The aim of this study is to determine the correlation between the DMFT index of 12-year-old children and the concentration of fluorine in drinking water from the populated areas where children live. Material and method: In the examination, 85children were enrolled, out of 2 central and 2regional primary schools, at which the DMFT index was determined. The children live in 2 different cities and 2 different villages. Four water samples were taken from the examined area to determine the fluorine concentration by using the electrochemical method using the pH/ISE Meter-Thermo-Orion with a special F-electrode (Thermo Orion Ion Plus Fluoride Electrode) at the Institute for public health. Spearman's method was used to determine the correlation between the specified variables. Results: The total number of children in the examined sample was 85, out of which45 were male and 40 were female. The average DMFT index in this group of children was 2.75 with a standard deviation of ±2.56. Maximum concentration of fluorine in drinking water of 0.39ppmF was determined in the village Vinicani, while the minimum (0.17ppmF) in the city Veles and (0.20 ppmF) in the village Melnica. Correlation of the DMFT index in children from the Vardar region and the concentration of fluorine in the drinking water has a negative, indirect correlation, with the value of the coefficient r=-0.393. Conclusion: The correlation between the DMFT index and the concentration of drinking water is a negative, indirect and correlation is highly significant.

The Effect of Water Fluoride Concentration on DMFT Index in Vardar Population in Macedonia

The aim of this study is to determine the correlation between the DMFT index of 12-year-old children and the concentration of fluorine in drinking water from the populated areas where children live. Material and method: In the examination, 85children were enrolled, out of 2 central and 2regional primary schools, at which the DMFT index was determined. The children live in 2 different cities and 2 different villages. Four water samples were taken from the examined area to determine the fluorine concentration by using the electrochemical method using the pH/ISE Meter-Thermo-Orion with a special F-electrode (Thermo Orion Ion Plus Fluoride Electrode) at the Institute for public health. Spearman's method was used to determine the correlation between the specified variables. Results: The total number of children in the examined sample was 85, out of which45 were male and 40 were female. The average DMFT index in this group of children was 2.75 with a standard deviation of ±2.56. Maximum concentration of fluorine in drinking water of 0.39ppmF was determined in the village Vinicani, while the minimum (0.17ppmF) in the city Veles and (0.20 ppmF) in the village Melnica. Correlation of the DMFT index in children from the Vardar region and the concentration of fluorine in the drinking water has a negative, indirect correlation, with the value of the coefficient r=-0.393. Conclusion: The correlation between the DMFT index and the concentration of drinking water is a negative, indirect and correlation is highly significant

The Effect of Water Fluoride Concentration on DMFT Index in Vardar Population in Macedonia

The aim of this study is to determine the correlation between the DMFT index of 12-year-old children and the concentration of fluorine in drinking water from the populated areas where children live. Material and method: In the examination, 85children were enrolled, out of 2 central and 2regional primary schools, at which the DMFT index was determined. The children live in 2 different cities and 2 different villages. Four water samples were taken from the examined area to determine the fluorine concentration by using the electrochemical method using the pH/ISE Meter-Thermo-Orion with a special F-electrode (Thermo Orion Ion Plus Fluoride Electrode) at the Institute for public health. Spearmans method was used to determine the correlation between the specified variables. Results: The total number of children in the examined sample was 85, out of which45 were male and 40 were female. The average DMFT index in this group of children was 2.75 with a standard deviation of ±2.56. Maximum concentration of fluorine in drinking water of 0.39ppmF was determined in the village Vinicani, while the minimum (0.17ppmF) in the city Veles and (0.20 ppmF) in the village Melnica. Correlation of the DMFT index in children from the Vardar region and the concentration of fluorine in the drinking water has a negative, indirect correlation, with the value of the coefficient r=-0.393. Conclusion: The correlation between the DMFT index and the concentration of drinking water is a negative, indirect and correlation is highly significant