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Pollution Indicators and Other Microorganisms in River Sediment

Ernest A. Matson, Sally G. Hornor and John D. Buck
Journal (Water Pollution Control Federation)
Vol. 50, No. 1 (Jan., 1978), pp. 13-19
Stable URL: http://www.jstor.org/stable/25039502
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Pollution Indicators and Other Microorganisms in River Sediment
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Abstract

Total and fecal coliforms, fecal streptococci, total heterotrophic mesophilic bacteria, and yeasts growing at 20° and 37°C were enumerated from sediment and water in the eutrophic Shetucket River basin in north-eastern Connecticut. The 2.5-year study was designed to determine whether the shallow river sediments upstream and downstream of a treated municipal wastewater effluent were an important reservoir of pollution indicator bacteria. Changes in microorganisms densities in water were monitored at three stations extending 4.5 km downstream of the effluent outfall. Results show large sediment populations at both upstream and downstream stations with sediment/water ratios as high as $5\times 10^{4}$. In this shallow (less than 1.5 m) river system, resuspended sediment populations were large enough to create a potential health hazard based on presently accepted indicator densities.

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