Evaluation of microbiological and physical-chemical parameters of individual wells in the city of Barcarena/PA
DOI:
https://doi.org/10.6008/CBPC2179-6858.2021.002.0048Keywords:
Groundwater, Water quality, PotabilityAbstract
Groundwater can be reached in different ways by anthropic action, directly influencing its quality and composition, and can bring harmful effects to the population supplied by these wells. The city of Barcarena belongs to the Metropolitan Mesoregion of Belém had its economic growth based on the implementation of large industrial projects. However, despite this growth, the city has a lack of infrastructure, population density, and inadequate land use and occupation with degradation of its water resources. To assess the impact of these activities, this work aimed to determine the quality of water from individual wells consumed by families living in the region close to the industrial area of Barcarena-PA according to the physical-chemical and microbiological parameters and the drinking conditions provided for in Annex XX of Consolidation Ordinance No. 5 of 09/28/2017 of the Ministry of Health. The study revealed that in a sample number of 50 wells, 100% of the samples did not meet the drinking conditions provided for in the aforementioned legislation, being that for microbiological parameters, the presence of total coliforms was detected in 84% of the samples and 54% showed contamination by Escherichia coli in the analyzed wells. When evaluating the outcome of the analysis of the physical-chemical parameters, the highest percentage of non-compliance was due to the pH, which reached 90%, followed by the apparent color parameter that represented 42% of failures. Considering also the contamination of the wells by E. coli, it was found that wells with a higher pH are more likely to be contaminated by E. coli. Therefore, it is possible to point out the fragility of the water resource, whose water quality can be closely associated with the depth of the well to collect water, local environmental vulnerability, infiltration and leaching that occurred in this region.
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