What does a colilert test specifically measure?

The colilert test is a widely used microbiological test specifically designed to detect the presence of coliform bacteria in water samples. This test employs a substrate that reacts with enzymes produced by coliform bacteria, resulting in a color change or fluorescence that indicates contamination.

While coliforms include a broader category of bacteria, the test is particularly useful in assessing water quality, as the presence of coliforms suggests that potentially harmful microorganisms may also be present, making it a critical tool for ensuring safe drinking water.

The test does not measure the presence of viruses or heavy metals, nor is it specifically focused on E. coli, though E. coli is a member of the coliform group. Thus, coliform bacteria serve as an important indicator of water sanitation and the overall microbiological quality of the water supply.