Sampling of liquids was carried out monthly at both high and low tide, for one year, at 5 sites on the Anil river and at 3 sites on the Bacanga river, for bacteriological pollution study. Total viable bacteria/100ml, MPN (Most Probable Numbers) of coliforms/100ml and MPN fecal coliforms/100ml were determined by the use of nutrient agar, lactose broth, brilliant green - lactose bile broth and E C broth. The results indicated that both rivers contained a higher bacterial concentration at the sources and showed a seasonal bacteriological pollution variation directly related to the tidal phases. According to the Brazilian Ministry of the Interior's standards, the water of both rivers presented a high degree of microbial pollution.
Water; Pollution; Bacteria