Study on the Fluoride Concentration in Drinking Water in Japan : Results around Kanto Area

DOI 2 Citations 16 References
  • MIHATA Teruyo
    Department of Dental Health and Public Health, Kanagawa Dental College
  • TODA Shinji
    Department of Dental Health and Public Health, Kanagawa Dental College
  • KOMIYAMA Mariko
    Department of Dental Health and Public Health, Kanagawa Dental College
  • KUSHIDA Mamoru
    Department of Dental Health and Public Health, Kanagawa Dental College
  • SONG Wenqun
    Department of Pediatric Dentistry, Kanagawa Dental College
  • ARAKAWA Hirohisa
    Department of Dental Health and Public Health, Kanagawa Dental College
  • UCHIMURA Noboru
    Department of Pediatric Dentistry, Kanagawa Dental College
  • IIZUKA Yoshikazu
    Department of Dental Health and Public Health, Kanagawa Dental College

Bibliographic Information

Other Title
  • わが国における水道水フッ素濃度に関する研究 : 近年の関東地方を中心とする測定結果

Search this article

Abstract

All drinking water contains fluoride as one of the trace mineral elements. According to the water quality standards of the Japan Waterworks Law, the fluoride content of tap water should be kept at a level not exceeding 0.8 ppmF. However, low concentrations of fluoride have no beneficial effects of dental caries prevention. We measured the fluoride concentration in drinking water samples collected from all over Japan. Dental students of our college were asked to collect drinking water samples in their hometown fill in a questionnaire form, and bring samples and completed questionnaires to the college. The fluoride concentrations of the samples were measured by a fluoride-specific electrode. At the same time, the fluoride concentrations in the drinking water of filtration plants all over Japan were surveyed through examination of the Statistics on Water Supply. Among 370 samples which were divided into three kinds of water, the numbers of tap water samples of large scale water systems were significantly high, followed by well water samples, and then water samples of small water systems. The average fluoride content of all samples was 0.076 ppmF. The maximum level was 0.55 ppmF, observed in tap water samples of large scale water systems, and the minimum level was less than 0.01 ppmF, observed in all kinds of water samples. The average fluoride content in the drinking water of purification plants all over Japan, according to the Statistics on Water Supply in 1984 to 1996, showed a gradual decreasing tendency, with a level of 0.093 ppmF in 1996. Therefore, it was clear that dietary fluoride intake from drinking water was substantially insufficient for purposes of oral health. We should discuss the implementation of systemic fluoride application after due consideration of other sources of fluoride intake.

Journal

Citations (2)*help

See more

References(16)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top