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USGS Ohio Water Science Center

Rapid Method for Escherichia coli in the Cuyahoga River

U.S. Geological Survey Open-File Report 20071210

By Amie M.G. Brady

This report is available below as a 9-page PDF for viewing and printing.


This study is a continuation of a previous U.S. Geological Survey (USGS) project in cooperation with the National Park Service at Cuyahoga Valley National Park in Brecksville, Ohio. A rapid (1-hour) method for detecting Escherichia coli (E. coli) in water was tested and compared to the standard (24-hour) method for determining E. coli concentrations. Environmental data were collected to determine turbidity, rainfall, and streamflow at the time of sampling. In the previous study (20045), data collected were used to develop predictive models to determine recreational water quality in the river at two sites within the park. Data collected during this continued study (2006) were used to test these models. At Jaite, a centrally located site within the park, the model correctly predicted exceedances or nonexceedances of the Ohio Environmental Protection Agency maximum for recreational water quality in 80 percent of samples. At Old Portage, a site near the upstream boundary of the park, the model correctly predicted recreational water quality in 58 percent of samples. All of the data collected in 20046 will be used to develop more accurate models for use in future studies. Analysis and discussion of model results are scheduled to be included in an upcoming USGS Scientific Investigations Report.






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  1. Graph showing Escherichia coli (E. coli) concentrations in water samples collected at Jaite compared to predicted concentrations from a multiple-linear regression model using results from the rapid method and turbidity .


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GET REPORT (90 KB) - 9 pages (8.5" by 11" paper)

Suggested Citation:

Brady, A.M.G., 2007, Rapid method for Escherichia coli in the Cuyahoga River: U.S. Geological Survey Open-File Report 20071210, 5 p.

For more information about activities of the USGS Ohio Water Science Center, see

U.S. Department of the Interior, U.S. Geological Survey
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Last modified: Friday, July 20, 2007, 3:15 PM
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