Physical-chemical and microbiological analysis of pluvial water used for consumption stored in reservoirs of a rural area in the municipality of condeúba

This paper presents results obtained from the determination of physico-chemical and microbiological parameters of rainwater used for human consumption. Eight rainwater samples were collected from reservoirs located in rural areas of the city of Condeúba located in the state of Bahia Southwest Region. The objective of this study was to evaluate and compare the results obtained by the analysis of the maximum values allowed in accordance with the Order of consolidation No. 5/2017 Annex XX of the Ministry of Health, which deals with water quality for human consumption and its standard potability. The results of analysis of pH ranged from 4.38 to 8.07 with an average of 6.49; hardness ranged from 26.8 mg / L to 106.4 mg / L, with a mean of 48.1 mg / L; electrical conductivity ranged from 10.8 to 146.9 S / cm, with an average of 79.96 S / cm; turbidity ranged from 0.35 to 8.18 NTU, with an average of 1.70 NTU; alkalinity ranged from 13.4 mg / L to 61.4 mg CaCO3 / L CaCO 3 with an average / total alkalinity of 39.8 mg / L CaCO3; 8,8K resistivity ranged from Ωm to 22,6K Ωm at an average of 12,82K Ωm; total solids ranged from 5.46 mg / L to 51.8 mg / l with an average of 35.44 mg / L; In the case of the results of microbiological analysis, the eight samples evaluated it was observed the presence of total coliform and, Escherichia coli absence in a sample only.