[Copper in the drinking water--cause of gastrointestinal symptoms?]

This suspicion has been raised on the basis of investigations done mainly in Sweden. The copper originates from the copper pipelines inside the houses, and the concentration is highest in newly built houses and in the morning, when the water has been unstirred in the lines over night. The literature concerning the metabolism and toxicology of copper is presented, and it is concluded, that sufficient investigations are missing.