Análise da qualidade da água de poços tubulares na região urbana de Chapecó - SC

Abstract

The objective of this study was to analyze the water quality of tubular wells in the urban region of Chapecó, by determining the physical, chemical and biological parameters, following the guidelines of the American Public Health Association (APHA), and the applicable law regarding the standards potability contained in Ordinance No.2914, of December 12, 2011. Three samples were taken in three city wells, called Point A, Point B and Point C, considering that access to water these local is free to the population, which searches for a water of the quality for consumption. Analyses consisted of a review of the parameters of temperature, hydrogen potential (pH), turbidity, apparent color, electrical conductivity, total alkalinity, acidity, total hardness, chloride, total and fecal coliforms (E. coli). The results of the water from point A were in accordance with the law, and should be used for human consumption. In point B, the results of analysis in relation to total coliforms and thermotolerant parameters (E. coli), were positive in 100 mL of sample, contrary to what advocates the current legislation, which recommends the absence of microbiological parameters mentioned in 100 ml of sample. Therefore, its use is not recommended for human consumption, because this water can cause damage to health. Another parameter considered outside the standards of legislation was the pH of the water supplied in the Point C, considered too acidic, as showed on average a pH of 5.4, while the law recommends a pH between 6.0 and 9.5 as the ideal for human consumption. It is recommended that further analysis will carried at the points B and C, in order to have the confirmation of the data presented in this work and from that can be provided corrective measures regarding the results outside the standards required by law.