Tin is poor metal and belongs to IVa of Periodic table of the elements. It is using in production of alloy, glass, porcelain and main against fungous and insects.
Origin in water
Because of tin ores loss, low solubility of tin salts, tin concentration in underground waters is in tracks. Tin in dopes can be presence in granites, sands and clays. Seawater has 0.2-0.3 g/l of tin (De Zuane, 1997).
Tin and its inorganic compounds poorly absorb in gastrointestinal channel. Tin does not accumulate in tissues and it quickly ejects from organism. Absorbed tin is mostly in liver and lungs with small tracks in tissues. It is not noticed cancer growth in long studies of cancerous on rats and mousses who feed with addition of tin-chlorides.
There are not cognitions about essence of this element in tracks in human nutrition.
The main negative effect at people is acute stomach irritation, because of tinned drinks (below 150 mg/kg) or food (below 250 mg/kg). There are not evidences about negative effects on people during chronic exposure.
Maximal allowable concentrations
Because of that, tin presence in drinking water does not represent risk for human health (WH0, 2004).