Bacterial contamination causes severe digestive problems, fever, nausea, diarrhea and sometimes even death. According to the EPA, total Coliform and E-Coli testing is recommended twice a year. The Pro-Lab do it yourself Bacteria In Water Test Kit offers a simple test which indicates the presence of bacteria in 48 hours. Optional lab analysis will specify the exact count and type of bacteria present. Laboratory results within two weeks. Express service is available for an additional fee.