WWRC 89-39
Bacteriological Aspects of a Mountain Watershed
Abstract
Numbers of fecal coliforms and fecal streptococci increased during the winter in a stream
near a ski area. These numbers returned to background levels within a month after the
ski area closed for the year. As the pollution events continued with time, the day of the
week on which maximal numbers were obtained changed. Maximum numbers of these
bacteria were seen in the afternoons when pollution was occurring. Minimum numbers
were found in the morning.
Fecal coliforms and fecal streptococci were enumerated in a stream above and below
the ski area for three summers. Statistically significant differences in the numbers of
these organisms occurred between the months studied, depending upon whether the
statistics were run upon numbers per 100 mL or upon numbers passing a point per
second.
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