Abstract
A survey was conducted in Culiacan, Mexico on the water quality of private roof water tanks (PRWT). Heterotrophic bacteria, total and fecal coliforms, Pseudomonas aeruginosa, enteroviruses, and protozoan parasites (Cryptosporidium oocysts and Giardia cyst) were enumerated in 25 PRWT samples. Physico‐chemical parameters such as pH, temperature, turbidity, and residual chlorine were also examined. P. aeruginosa was found in 28% of the samples; 32% also contained total coliforms, and 20% Escherichia coli. Heterotrophic plate count (HPC) bacteria were found in all of the samples with concentrations between 102 and 105 CFU/mL. No enteroviruses or protozoan parasites were detected suggesting adequate protection from human or large animal contamination.
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