Abstract: ObjectiveTo investigate urinary arensic content in non-occupationally exposed adults in heavy metal contaminated area due to mining in Hezhang county,Guizhou province.MethodsThe subjects older than 45 years were randomly recruited from the mineralized area(Magu village)and unmineralized area(Salaxi village).Urine samples of the villagers were collected and arensic content in the urine was detected.ResultsThe urinary arensic contents for male and female in Magu village were 46.97μg/gCr and 56.30μg/gCr and those for male and female in Salaxi village were 36.55 μg/gCr and 45.83μg/gCr,respectively.The average urinary arensic content of Magu villagers was higner than that of Salaxi villagers.The arensic content in urine for the females was higner than that of the males.ConclusionThere were no villagers suffer from chronic arensic poisoning in the two areas.The 95% upper limit of urinary arensic content for non-occupational adults in Magu village were 99.40μg/gCr and 141.92μg/gCr,and that in Salaxi village were 65.70 μg/gCr and 78.06μg/gCr,respectively.