Table 5: Chronological representation of the proposals from the official services (subjects, institutions) with respect to determination of the optimal concentration and avoidance of harmful concentration of fluorine in water.
| Institutions | Proposed Cf mgF/l | Average annual value of maximal daily temperature | Remarks about proposed values | ||
|---|---|---|---|---|---|
| Guidebook 1962, US Pub Health service Healthy People 2010 US Health and Human services, 2000 |
Optimal concentration | 1.2 | 10.0-12.0 | Prevention of dental caries: provide Risk of dental caries:
• Mild grade • Small per cent of people • Inconsiderable sensitive problem |
|
| 1.1 | 12.1-14.6 | ||||
| 1.0 | 14.7-17.6 | ||||
| 0.9 | 17.7-21.4 | ||||
| 0.8 | 21.5-26.2 | ||||
| 0.7 | 26.3-32.5 | ||||
| 1971 WHO International Standards for drinking water Guidelines | 0.9-1.7 | 10-12 | Borders are determining in compliance with the local temperature of the air | ||
| 0.6-0.8 | 26.3-32.6 | ||||
| 1980 Decree 80/778/EOC (Equal Opportunities Commission) | Max. 1.5 | 8-12 | Borders are determining in compliance with the local temperature of the air | ||
| Max. 0.7 | 25-30 | ||||
| 1984 & 1993 WHO International Standards for drinking water Guidelines | Max. 1.5 | 10-12 | Borders are establishing by the local conditions:
• Climate • Consumption of water |
||
| 1994 WHO expert Committee on Oral Health& Fluoride use | Max. 1.0 | Cold climate | Borders are review with respect to:
• Climate • Consumption of water • Other sources of fluorine |
||
| Max. 0.5 | Tropical and subtropical climate | ||||
| 2003 Council of Europe Directions 98/83/European Community Offical Journal of the European Union | Max. 1.5 | There isn’t report about the temperature of the air | Member States of the European Union of the European Union determine their own optimal value of fluorine | ||
| 2003 WHO Guidelines for drinking water quality | Max. 1.5 | There isn’t report about the temperature of the air | National standards are nominating in proportion to:
• Water consumption • Fluorine intake from other sources |
||
Despite WHO standards, contamination of water resources whether by naturally occurring phenomena or chemical wastes due to urbanization is one of the major ecological concerns in the world today [40].