Urinary levels of metal elements in the non-smoking general population in Italy: SIVR study 2012-2015.

•The study provides the reference values for thirteen trace elements in the urine of the Italian general population.•No Italian data are currently available for establishing urinary reference values for a large number of elements.•Six different laboratories carried out the analysis after interlaboratory control tests were performed on urinary samples.•The results have been reported in micrograms/L and in micrograms/g creatinine.•To evaluate the modification of urinary metals over time a larger number of subjects should be enrolled for biomonitoring.