ve To explore the characteristics of water quality of underground water in chronic endemic arsenic poisoning areas of Hohhot. Methods 74 underground water samples were collected from chronic endemic ar-senic poisoning areas of Hohhot in Nov. 1998 and Apr. 1999 respectively for water quality analysis. The analysis and comparision of every indexes of water quality of high-arsenic water samples (As≥50?g/L) and low-arsenic water samples (As

Objective To study the distribution of As and other trace elements in drinking water,grain and soil of arsenism disease area in Tumotezuoqi of Inner-Mongloia and to provide theoretical bases for the prevention and treatment of endemic arsenism and improving water quality.Methods The concentrations of As and other trace elements in well-water,wheat,corn,sorghum and soil were determined using neutron activation analysis.Results The result showed that the arsenic contents in drinking water of Tumotezuoqi were from139to899?g /L,which were much higher than that of the allowance limit(