UNC professor develops simple water test that can save lives, one bag at a time

Enter Dr. Mark Sobsey, a professor of public health at the University of North Carolina-Chapel Hill. Sobsey developed a cheap and simple test to determine how many E. coli bacteria live in a given water sample. His Compartment Bag Test (CBT), which looks like a plastic reclosable bag with five internal compartments, doesn’t require fancy lab equipment or trained technicians. (

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