Question: A 100 mL water sample is collected from the San Diego River during a rain event and sample dilutions of 1:1,000 and 1:100,000 are analyzed

A 100 mL water sample is collected from the San Diego River during a rain event and sample dilutions of 1:1,000 and 1:100,000 are analyzed for total coliforms and E. coli using the IDEXX Colilert test with the Quanti-Tray 2000 system. After the overnight incubation, the following results are obtained:

A 100 mL water sample is collected from the San Diego River

Use the IDEXX Quanti-Tray 2000 MPN look-up tableLinks to an external site. and consider the dilution levels to calculate the concentrations of E. coli and total coliforms in the river. Express your answers with the units of MPN/100 mL.

IDEXX Quanti-Tray 2000 MPN table links:

during a rain event and sample dilutions of 1:1,000 and 1:100,000 areanalyzed for total coliforms and E. coli using the IDEXX Colilert test

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