A STUDY OF FAECAL BACTERIA IN THE RIVER KYMI (SOUTH EAST FINLAND)

Abstract

Bacteriological observations made on samples taken monthly from the River Kymi over a two year period (June 1964–May 1966) were subjected to statistical analysis. The ratios of numbers of coliforms to those of faecal streptococci (C/F) were found to vary significantly with both the river temperature and water level. High C/F values were associated with high temperatures and high water levels. The former of these findings is probably attributable to the multiplication of coliforms in the river. It is suggested that the latter could arise from more efficient homogenization of coliform aggregates by increased turbulence at high water or from selective adsorption of streptococci by suspended clay particles.