A satisfactory result with the multiple tube fermentation procedure is less than 2.2 coliform bacteria per 100 ml. An example test report is shown in Figure 1. Positive coliform bacteria test results ...

of coliforms present per 100 mL of water. The samples should be incubated for 48 h at 35˚C. If the test is positive, the confirmed test is performed. The confirmed test involves taking a sample from a ...

The city said the boil advisory started after a monthly routine water test from the Department of Environmental Quality. One of those tests came back positive for coliform so DEQ had the city re ...