Abstract
CAS correspond to the modalities of supply different from the public systems and have been monitored by the Program of Surveillance of the Water Quality for Human Consumption, aiming at the health protection. The free chlorine content (FC) reported with the sample Identification (N,N-Diethyl-1,4-phenylenediammonium - colorimetric) and 3703 bacteriological results (enzyme substrate technique - Standard Methods for Examination of Water and Wastewater (2005), IN the 102 municipalities covered by the (GVS 29) and 30 - Jales - SP (GVS 30) collected from 2011 TO 2016, were evaluated according to MS ordonnance No. 2914 of December 12, 2011. Of the 3670 samples from GVS region 29, 1648 (44.9%) were in legal disagreement in at least one of the parameters: FC and Escherichia coli being 1558 (94.5%) by FC and 148 (9.0%) by Escherichia coli. In the 33 samples (0.9%) from GVS 30, 3 (9.1%) were in disagreement with FC and 7 (27.5%) total coliforms, and 127 (12.6%) disagreed. (21.2%) was evidenced by coliforms, due to the inadequacy of the FC and the presence of fecal contamination indicators in the analyzed samples Results revealed the vulnerability of the water consumed by communities that use the CAS.
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