MICROBIOLOGICAL AND PHYSICOCHEMICAL ANALYSIS OF THE WATER FROM THE HEADQUARTERS OF THE CITY OF PALMEIRÂNDIA-MA
DOI:
https://doi.org/10.16891/2317-434X.v11.e3.a2023.pp2171-2178Abstract
In order to comply with the potability standard established by the Ministry of Health, water for consumption must meet physical-chemical, microbiological and radioactive parameters without causing a risk to health. This work aimed to evaluate the quality of water distributed in the seat of the municipality of Palmeirândia in the state of Maranhão. 3 samples were collected at different supply points before and 3 samples after treatment. The physical-chemical (pH, conductivity, color and odor) and microbiological parameters were evaluated: total coliforms and thermotolerant coliforms using the multiple tube technique, counting of heterotrophic bacteria using the pour plate technique, and counting fungi using the spread plate technique. To carry out the analyzes, the tests established in Consolidation Ordinance No. 5/2017 were used. In the microbiological analyzes, no growth was detected in the Verde Brilhante and EC broths, indicating that there was no presence of microorganisms from the coliform and thermotolerant group, therefore, within the standards determined by legislation. In the count of heterotrophic bacteria, there was a reduction in the number of colonies after treatment in all samples, except in sample 1, which showed a value above the standard. Fungal counts detected colonies, however, no pathogenicity assessment was performed. Thus, it is concluded that the analyzed samples presented values within the established limit for pH. Regarding conductivity, all were out of standard. As for color, all analyzed samples were clear and, for odor, all samples were odorless.
Keywords: Potable water; Quality control; Coliforms.