서울 千戶洞地域井戶의 大腸菌汚染調査

A Study on the Contamination of Wells in Chonhodong Area

A study was conducted to find out the biological contamination of wells ìn Chon Ho Dong areas, Seoul, Korea from May 4, 1971 through May 18 1971. Coliform groups were detected by membrane filter method and general sanitary conditions were checked. The results obtained were summarized as follows: 1) 61 wells (81.3%) out of 75 wells showed the evidence of coliform‘ group. In urban areas it is recommended to use disinfectants for wel1s pretty frequently. 2) The wells in native villages were less contaminated than those in new villages established by p∞r people from slum areas of Seou1. 9 out of 15 wells at Song Pa Dong, which is a native vi1lage, were coliform group free, However, at Bang E Dong’s new vì1lage, 19 out of 20 wells were contaminated by eo1iform groups. 3) Co1iform groups were positive at 57 out of 61 open wellf, while only 4 out of 14 pumping weIls showed the evidence of coliform groups. 4) 38 out of 40 poor1y drained wells were contaminated, however, 13 out of 25 well drained wells were coliform organisms positive.