The Intake From Drinking Water Essay

1322 Words Nov 23rd, 2014 6 Pages
Al intake from drinking water The World Health Organization (WHO/IPCS, 1997) has recommended that Al concentrations in drinking water not to exceed 0.2 mg/liter, stating “. . . the positive relationship between Al in drinking-water and AD, which was demonstrated in several epidemiological studies, cannot be totally dismissed. Taken together, the relative risks for AD from exposure to Al in drinking water above 100 mg/liter are low (less than 2.0).” The US Environmental Protection Agency set 0.05 mg/liter as a limit in 1985. The European Economic Community has established a recommended guideline of 0.05 mg/liter and a maximum permissible level of 0.2 mg/liter. Numerous epidemiological reports were published on the subject of exposure to Al from drinking water and risk of AD (Vogt 1986).
First attempts to relate the actual levels of Al in drinking water to AD were made in 1986, when two parallel Norwegian studies reported higher mortality from dementia (from all causes) in areas with high concentrations of Al in drinking water (Martyn et al. 1989). A cross-sectional investigation conducted a few years later in England and Wales (Frecker 1991) found that among all other causes of dementia the risk of AD was 1.5 times higher in districts where the mean Al concentration in drinking water exceeded 0.11 mg/liter, compared to the districts where Al concentrations were less than 0.01 mg/liter; no relation was found between any other neurological condition and concentrations of Al in…

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