LIMA, A. P. R.; LIMA, Ana Priscila Rodrigues.
Resumo:
Water is a natural resource that is indispensable for life and it is one of the biggest
global concerns regarding to its availability and especially quality. This study aimed
to evaluate, by microbiological characterizing, the water quality of four points of
Pianco River in Pombal City of Parafba. For this purpose, experimentations were
carried out from four preestablished points. For the microbiological analysis, double
concentration Lactose Broth (CLD), Simple Lactose Broth (CLS) and Brilliant Green
Bile Lactose Broth (CVBB) were the means, using E.coli for the confirmatory testing
of Thermotolerant Coliforms. The four samples results were positive, showing
contamination by fecal and total Coliform. The results were interpreted based on
NMP/100 mL chart, showing the following numbers: the first studied point (P1) was
918/100 mL, the second (P2) was 918/100 mL, the third studied point (P3) obtained
542/100 mL, the fourth point (P4) was 542/100 mL, all for Coliforms Totals. For Fecal
Coliforms, the results showed the following numbers: the first studied point (P1) was
33/100 mL, the second (P2) the result was 94/100 ml, the third point (P3) analyzed
79/1 OOmL and the fourth point (P4) obtained the number of 109/100 mL. With the
results it was verified that all of the points studied are inappropriate for the human
use because of the bacterial contamination of the water.