“…In 1983, studies in Copenhagen indicated that the nickel content of hot tap water in some flats was higher than that of cold water, but that in other flats, cold water contained a higher content of nickel than hot water (1). First samples of cold tap water collected in Leoben contained only 2 mg/100 ml, and first hot water samples contained up to 4 mg nickel/100 ml (2).…”