Abstract
Perform microbiological analysis of drinking water distributed via hydraulic piping to homes located in a flooded neighborhood of the city of Macapá - AP. Methods: Cross-sectional, descriptive and quantitative study, carried out by collecting water samples from 23 duplicate households identified as (A and B), totaling 46 samples analyzed. For the analysis of the collections, the Most Probable Number method was used, which establishes the quantity of coliforms per 100 mL, providing information about the water potability. Results: Microbiological analysis of samples collected from 23 residences revealed that 8 houses (34.8%) were positive for total coliforms and 6 houses (26.1%) positive for thermotolerant coliforms. Regarding heterotrophic bacteria, 13 houses (56.5) presented positive results, and 11 of these houses (84.6%) presented results above 500 CFU / mL. Water contamination was observed by faecal coliforms in some households, due to submerged pipes and poor conditions of the hydraulic installations. Conclusion: Although houses are served by water from the city's treatment supply network, lack of maintenance in the pipelines and contact with water from the flooded area may be a contributing factor to these contaminations.