This experiment was carried out to evaluate general characterístics of the water qualíty‘ total colíform, fecal coliform and microflora at the St. 1 to St. 3 and St. 4 to St. 7. Eighty-four water samples were collected from the 7 stations from July 1988 to April 1990 (see Fig 1) Range and mean value of the samples were as follows; water temperature 2.0-29.9 C ‘ 16.3 C; pH 6.86-9.08, 7.62: electrical conductivíty 54.85 μ rJ/ cm-4.300 mrJ/ αn ， 91 l. 93 μ rJ/ cm turbidity 0.9-36 NTU, 6.8 NTU, respectively. pH and electrícal conductivity at St. 4 to St. 7 were higher than those at St. 1 to St. 3, but turbid ity at St. 1 to St. 2 was 7 times hígher than that at Sónagdong river area. The bacterial density of the samples ranged 91-110 ,000/ 100m! for total colíform. 21-15 ,000/ 100m! for fecal coliform. Specially, the geometric mean value of the S I. 3 was 11 ,836/ 100m! for it leveled heavy contaminaiton. Predominant species among the 3,874 strains isolated form the samples were 30.6% Enterobacteriaceae, 14.7% Acinetohacter, 9.0% Aeromonas . . 8.9% Neisseria, and 7.5% νïbrio.
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