scholarly journals Fluoride concentration in water at the area supplied by the Water Treatment Station of Bauru, SP

2006 ◽  
Vol 14 (5) ◽  
pp. 365-370 ◽  
Author(s):  
Carolina Simonetti Lodi ◽  
Irene Ramires ◽  
Marília Afonso Rabelo Buzalaf ◽  
José Roberto de Magalhães Bastos
Keyword(s):  
Water Treatment ◽  
Water Supply ◽  
Water Samples ◽  
Fluoride Concentration ◽  
Descriptive Statistics ◽  
Public Water Supply ◽  
The Public ◽  
Water Treatment Station ◽  
Sensitive Electrode

OBJECTIVE: to analyze the fluoride concentration in the public water supply at the area supplied by the Water Treatment Station of Bauru and classify the samples as acceptable or unacceptable according to the fluoride concentration. MATERIAL AND METHODS: samples were collected from 30 areas at two periods, October 2002 and March 2003. The fluoride concentration in the samples was determined in duplicate, using an ion sensitive electrode (Orion 9609) connected to a potentiometer (Procyon, model 720). Samples with fluoride concentration ranging from 0.55 to 0.84 mg F/L were considered acceptable, and those whose concentration was outside this range as unacceptable. Data were analyzed by descriptive statistics. RESULTS: the fluoride concentration of the water samples varied between 0.31 and 2.01 mg F/L. Nearly 56% of the samples were classified as acceptable. CONCLUSION: the variations in fluoride concentration at the area supplied by the Water Treatment Station reinforce the need of constant monitoring for maintenance of adequate fluoride levels in the public water supply.

scholarly journals Fluoridation of the public water supply and prevalence of dental fluorosis in a peripheral district of the municipality of Bauru, SP

2006 ◽  
Vol 14 (2) ◽  
pp. 136-141 ◽  
Author(s):  
Irene Ramires ◽  
Kelly Polido Kaneshiro Olympio ◽  
Andréa Gutierrez Maria ◽  
Juliano Pelim Pessan ◽  
Vanessa Eid Silva Cardoso ◽  
...  
Keyword(s):  
Water Supply ◽  
Water Samples ◽  
Dental Fluorosis ◽  
Fluoride Concentration ◽  
Epidemiological Survey ◽  
Public Water Supply ◽  
Prior Authorization ◽  
The Public ◽  
Electrode Method ◽  
Sensitive Electrode

OBJECTIVES: The objectives of this study were to assess the fluoride concentration in the public water supply and the prevalence of dental fluorosis in schoolchildren between 7 and 15 years old, living in a peripheral district of the municipality of Bauru. MATERIAL AND METHODS: For this, fifty two water samples were collected on three different days of one week. These samples were analyzed for fluoride by means of the ion-sensitive electrode method (Orion 9609) coupled to a potentiometer (Procyon, model 720). In this method, 1.0 mL of TISAB II (Orion) was added to 1.0 mL of the sample. For the epidemiological survey of fluorosis, 52 schoolchildren of both genders, aged between 7 and 15 were assessed, with prior authorization from their caretakers. Only one person examined the children, after supervised toothbrushing and drying with cotton wool rolls. The TF index was used. RESULTS: The fluoride concentrations in the water samples ranged from 0.62 to 1.20 mg/L, with a mean of 0.9 mg/L. The prevalence of dental fluorosis was 33%, with severity ranging from TF1 to TF4 (Kappa of 0.73 and concordance of 83.33%). CONCLUSIONS: The results from the analysis of water samples indicated a fluoride concentration greater than recommended for Bauru. The fluorosis levels found were higher than expected for a peripheral district, in which water is one of the few sources of fluoride.

The fluoride concentration of the public water supply in the urban zone and indigenous villages of Baía da Traição, Paraíba, Brazil

2018 ◽  
Vol 3 (1) ◽  
pp. 29-35
Author(s):  
Natanael Victor Furtunato BEZERRA ◽  
Karla Lorene de França LEITE ◽  
Mariana Marinho Davino de MEDEIROS ◽  
Mariana Leonel MARTINS ◽  
Wilton Wilney Nascimento PADILHA ◽  
...  
Keyword(s):  
Water Supply ◽  
Fluoride Concentration ◽  
Public Water Supply ◽  
The Public ◽  
Urban Zone

Use of the HDS System (Hydric Depuration with Soils) Associated to Other Constructed Wetlands Techniques for Public Water Supply

1999 ◽  
Vol 40 (3) ◽  
pp. 203-210
Author(s):  
E. Salati ◽  
E. Salati ◽  
E. Salati ◽  
S. M. Tauk-Tornisielo ◽  
D. F. Brega ◽  
...  
Keyword(s):  
Water Treatment ◽  
Water Supply ◽  
Constructed Wetlands ◽  
Pilot Project ◽  
Sao Paulo ◽  
Public Water Supply ◽  
São Paulo ◽  
Experimental Station ◽  
Water Treatment Station ◽  
The Town

Two projects of water treatment for public water supply were developed and operated by using combined systems of constructed wetlands. One of the projects was carried out in the town of Analândia, São Paulo, Brazil and wetlands with floating aquatic plants associated to the HDS system were used. Nearly 6,480 inhabitants were supplied. The other conducted project was an experimental station in partnership with SABESP (São Paulo State Sanitation Agency / Brazil), for the pretreatment of 1,700 l.s−1 of waters from the Cotia River, which is used for the population's supply after conventional treatment at the Lower Cotia Water Treatment Station. For this pilot project, wetlands with emergents and floating plants associated to the HDS system were used. The proposed objectives were achieved in both projects.

scholarly journals Fluoride concentration in public water supply: 72 months of analysis

2012 ◽  
Vol 23 (4) ◽  
pp. 451-456 ◽  
Author(s):  
Suzely Adas Saliba Moimaz ◽  
Orlando Saliba ◽  
Fernando Yamamoto Chiba ◽  
Doris Hissako Sumida ◽  
Cléa Adas Saliba Garbin ◽  
...  
Keyword(s):  
Public Health ◽  
Water Supply ◽  
Water Distribution ◽  
Graduate Program ◽  
Fluoride Concentration ◽  
Water Distribution Network ◽  
Public Water Supply ◽  
The Public ◽  
Northwest Region ◽  
The City

Known as one of the ten most important advances on Public Health in the 20th century, fluoridation of public water supply is a measure of wide population coverage, which is effective on caries control. The city of Araçatuba, in the Northwest region of the São Paulo state, Brazil, started public water supply fluoridation in 1972 and, based on the average annual highest temperature, has kept the fluoride concentration between 0.6 to 0.8 mgF/L. The purpose of this study was to analyze monthly the fluoride concentration in public water supply in the city of Araçatuba during 72 months. Water samples were collected monthly on weekdays, directly from the water distribution network, on pre-established locations and analyzed in duplicate between November 2004 and October 2010 at the Research Laboratory of the Nucleus for Public Health (NEPESCO) of the Public Health Graduate Program from Araçatuba Dental School/UNESP, Brazil, using an fluoride-specific electrode connected to an ion analyzer. From the total of samples (n=591), 67.2% (n=397) presented fluoride concentration between 0.6 and 0.8 mgF/L; 20.6% (n=122) below 0.6 mgF/L; 11.5% (n=68) between 0.8 and 1.2 mgF/L and 0.7% (n=4) above 1.2 mgF/L. Most samples showed fluoride levels within the recommended parameters. Minimal variation was observed among the analyzed collection locations, showing that the city has been able to control the fluoride levels in the public water supply and reinforcing the importance of surveillance and constant monitoring to assure the quality of the water delivered to the population.

scholarly journals Monitoring of fluoride in the public water supply using electrometric or colorimetric analyses

2020 ◽  
Vol 15 (6) ◽  
pp. 1
Author(s):  
Caio Luiz Lins-Candeiro ◽  
Karen Katlein Dolenkei ◽  
Luiz Renato Paranhos ◽  
Douglas Queiroz Santos ◽  
Jaime Aparecido Cury ◽  
...  
Keyword(s):  
Water Supply ◽  
Dental Fluorosis ◽  
Fluoride Concentration ◽  
Public Water Supply ◽  
Water Fluoridation ◽  
The Public ◽  
Public Supply ◽  
Paired Samples ◽  
First Choice ◽  
Fluoride Ion Selective Electrode

The surveillance of the concentration of fluoride in the public water supply aims to ensure the balance between the benefits (carie prevention) and risk (dental fluorosis) of water fluoridation programs. The aim of this study was to check the accuracy of two analytical methods for monitoring the concentration of fluoride in the public water supply of a Brazilian city. The STROBE checklist was used to aid the conduction of this study and report the results. It was an analytical, observational, and prospective study using the water supply of Uberlândia, MG, Brazil. We collected 126 water samples at 21 sites for six consecutive months and analyzed them using the fluoride ion selective electrode (F-ISE) method and colorimetry with SPADNS. The statistical analysis was performed descriptively and then the ANOVA and Student t-test for paired samples were applied. The results showed that the F-ISE method had a lower coefficient of variation (12.3%) than the SPADNS method (57.4%). There was no significant variation of the fluoride concentration in the water through the supply network evaluated either by F-ISE as SPADNS. We concluded that the electrometric method should be the first choice for use by laboratories that monitor fluoride concentration in the public supply water.

scholarly journals Epidemiology of fluorosis and dental caries according to different types of water supplies

2010 ◽  
Vol 15 (suppl 1) ◽  
pp. 1841-1847 ◽  
Author(s):  
Solange de Oliveira Braga Franzolin ◽  
Aguinaldo Gonçalves ◽  
Carlos Roberto Padovani ◽  
Leda Aparecida Francischone ◽  
Sara Nader Marta
Keyword(s):  
Water Treatment ◽  
Dental Caries ◽  
Water Supply ◽  
Public Water Supply ◽  
Entire Sample ◽  
Water Supplies ◽  
Different Types ◽  
Water Treatment Station ◽  
The Relationship

The aim of this article is to investigate the relationship between fluorosis/dental caries in schools, according to the level of fluoride in public water supply. The sample comprised of twelve-year-old daytime students (360) of both genders, attending schools close to the region where they were born. The schools were classified into three groups according to the presence of fluoride in the water supply: 1) fluoridation in the Water Treatment Station-WTS; 2) Direct Fluoridation in Wells-DFW; and 3) Non Fluoridated Areas-NFA. The χ2 and Goodman tests (significance=5%) were used to evaluate the association between the origin of water and degree of fluorosis; percentage of distribution and descriptive measures were used for investigation of the degree of fluorosis. The following outcomes were predominant: presence of dental caries in the entire sample (P<0.05); absence of fluorosis in both genders, for white individuals and subjects living in areas supplied by both DFW and NFA (P<0.05). There was no difference in the severity of fluorosis between the sources of water supply (P>0.05). Dental caries is still an important problem in this population, despite the establishment of preventive measured. The observation of fluorosis in students living in non-fluoridated areas confirms the presence of other sources of fluoride.

scholarly journals Outbreak of Cryptosporidiosis after Contamination of the Public Water Supply in Saitama Prefecture, Japan, in 1996

2000 ◽  
Vol 74 (6) ◽  
pp. 518-526 ◽  
Author(s):  
Norishige YAMAMOTO ◽  
Ken-ichi URABE ◽  
Masatoshi TAKAOKA ◽  
Kiyoaki NAKAZAWA ◽  
Atsushi GOTOH ◽  
...  
Keyword(s):  
Water Supply ◽  
Public Water Supply ◽  
The Public

scholarly journals Content of Fluorine in Drinking Water in FYR Macedonia

2014 ◽  
Vol 18 (1) ◽  
pp. 35-37
Author(s):  
M. Carcev ◽  
D. Gjorgev ◽  
F. Tozija ◽  
H. Petanovski
Keyword(s):  
Public Health ◽  
Drinking Water ◽  
Dental Caries ◽  
Water Supply ◽  
Longitudinal Studies ◽  
Optimal Concentration ◽  
Public Water Supply ◽  
The Public ◽  
Who Standards

Abstract From all the methods applied in preventing dental caries, the most significant is the use of fluorides. Nowadays, 6 decades after its massive use, it can certainly be argued that it is the most efficient, cheapest and safest way of preventing dental caries, confirmed by more than 150 longitudinal studies. In order to determine the presence of fluorides in drinking water, in coordination with the Institute for Public Health of the FYR Macedonia in 2009, we conducted a research for determining the presence of fluorides in drinking water from the public water supply in the country. The results from the research showed that concentration of fluorine in drinking water in our country is under 0.3ppm (0.3 mg per litre of water), which indicates a really low amount in accordance to the WHO standards. Optimal concentration was registered in only few water supply facilities in less settled areas, while hyper-fluorinated water was registered in few village wells, which were put out of use after they were located.

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