Qualidade microbiológica da água do Rio Piancó, Município de Pombal - PB.

Abstract

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.