An analysis of the total coliform bacteria populations and their numerical densities in Lake Houston Reservoir, Houston, Texas.

Total coliform bacteria population densities were measured during a twelve month study on Lake Houston Reservoir. Samples were collected from seven sampling sites located on the lake and in the East and West forks of the San Jacinto River. Coliform densities were compared with physicochemical data to determine if any significant correlation exists. A coliform bacteria species list was also compiled during the study. A multilinear regression equation was constructed to predict total coliform densities from certain physicochemical parameters. Flow rates in the major tributaries of the San Jacinto River appear to have the greatest effect on coliform bacteria populations, particularly in the West Fork Region of the reservoir. High flow rates, along with high nutrient levels, might possibly indicate domestic sewage contamination in certain regions of the lake. Klebsiella pneumoniae was the most common coliform organism isolated during the study, and is a common intestinal inhabitant of warm blooded animals.