Detection of fecal coliform bacteria in water is a strong indication of sewage or animal waste contamination. Primary routes of coliform pollution of water supplies include flood, run-offs, uncapped wells and untreated waste matter. A harmful strain of Escherichia coli (E.coli 0157:H7) produces a powerful enterotoxin that can cause severe illness. Although some coliform bacteria may not be pathogenic, their presence in water signals the presence of potentially pathogenic organisms including viruses from the intestinal tract of warm blooded animals. This study presents bacteriological evaluation of three drinking water sources of a black belt county. Raw river water samples were collected from a treatment plant and two drinking water wells were sampled. Post-treatment water samples were collected from the plant, wells and consumers. The presence, absence and abundance of coilforms were analyzed using IDEXX colilert. E.coli and other coliform type bacteria were found in the plant raw river water samples (before treatment) with an MPN index of 848±119 per 100 mL during winter. The plant's raw river water sample was positive for enterococci determined by IDEXX enterolert method. The raw well water samples were free of coliform type organisms. All the post treatment samples from the plant, the wells and consumers were free of coliform type bacteria indicating good drinking water quality and efficient water treatment procedures. Further studies will employ molecular tools to track the sources E.coli in the untreated river water.