health.seoul.go.krhealth.seoul.go.kr/files/2012/08/25-44.pdfheavy metals were detected below the...
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health.seoul.go.krhealth.seoul.go.kr/files/2012/08/25-44.pdfheavy metals were detected below the standard of environment. 4. The annual average of coliform group was 7.2 X 104/100