It'll be fine with a bit of ice and lemon

Abstract

The presumptive coliform count, the classic foundation of water testing, has long been supplanted by more sophisticated membrane filtration and most-probable-number tests. Yet these modern versions of the traditional technique are still based on the idea of distinguishing between water containing coliforms, which should not be consumed, and water lacking them, which is probably safe. Although Escherichia coli dies out in a watery environment outside the body, it does not die more quickly than bacterial pathogens.