Incubated Bacteria Samples

Our two most popular tests are for the presence of Total Coliform Bacteria and Fecal/E. Coli Bacteria. The left sample has no bacteria as it did not turn yellow. The other two have Coliform Bacteria in them. Below under the "black light" or Ultraviolet light you can see that the right hand sample turns purple indicating the presence of Fecal/E. Coli.