Investigation on Water Source Contamination of Drinking Water Provided for Themselves in the Eastern Unit of Lanzhou Command / 环境与健康杂志

ABSTRACT

Objective To know the quality of water sources of drinking water provided for themselves in eastern unit of Lanzhou Command. Methods The water samples were collected from 194 water sources and the total coliform, ammonia, nitrite were determined according to the standard GJB1096-91. Results Of 194 drinking water sources, as to total coliform, ammonia, nitrite, 48.0%, 55.2%, 90.2% respectively were under the standard limits. Based on the comprehensive evaluation, unpolluted water sources accounted for 30.4%(59/194), lightly polluted 66.0% (128/194)and seriously polluted 3.6% (7/194) respectively. Conclusion 69.6% of water sources of drinking water provided for themselves were polluted in different degree in eastern unit of Lanzhou Command.