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This Web site provides the users of the Chattahoochee River and citizens of Atlanta with current predictions of E. coli bacteria concentrations for sites on the Chattahoochee River. Predicting bacteria concentrations in "real time" requires using other indicators, in this case, turbidity, that have a correlation to bacteria. Estimating bacteria concentrations from turbidity is a new and inexact science, and the statistical model that ties the two together is not just a simple straight-line correlation.
This page provides you with links to the background information you need to better understand what the BacteriALERT data mean. |
| Background information: | |
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Project introduction: FInd out the purpose of the BacteriALERT project. |
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Water-sample analysis: FInd out how a water sample is analyzed for E. coli bacteria. |
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Chattahoochee River sampling sites: | |
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Chattahoochee River at Medlock Bridge Rd. |
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Chattahoochee River at Paces Ferry Rd. |
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Understanding bacteria and data: | |
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Find out about bacteria: Find out about E. coli bacteria, where it comes from, and why it is important. |
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USEPA's E. coli bacteria criteria. USEPA's water-quality criteria states that E. coli counts of greater than 235 colonies/ 100 mL of water sample indicate a higher chance of illness in people coming in contact with the water. |
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Understanding turbidity. We are using turbidity as a predictor of E. coli bacteria. Find out what turbidity is and how it is measured. |
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Understanding BacteriALERT data: Find out about E. coli bacteria, turbidity, and how the E. coli counts relate to the USEPA's E. coli criteria. |
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