title: Quality of water sources used as drinking water in a Brazilian peri-urban area.
abstract: The objective of this paper was to assess bacteriological quality of drinking water in a peri-urban area located in the Metropolitan Region of São Paulo, Brazil. A total of 89 water samples were collected from community plastic tanks and 177 water samples from wells were collected bimonthly, from September 2007 to November 2008, for evaluating bacteriological parameters including: Escherichia coli, Enterococcus and heterotrophic plate count (HPC). Clostridium perfringens was investigated in a subsample (40 samples from community plastic tank and 40 from wells). E. coli was present in 5 (5.6%) samples from community plastic tanks (2.0 - 5.1x10(4) MPN/100mL) and in 70 (39.5%) well samples (2.0 - 8.6x10(4) MPN/100mL). Thus, these samples were not in accordance with the Brazilian Regulation. Enterococcus was detected in 20 (22.5%) samples of the community plastic tanks (1 to 79 NC/100mL) and in 142 (80.2%) well samples (1 to >200 NC/100mL). C. perfringens was detected in 5 (12.5%) community plastic tanks samples and in 35 (87.5%) wells samples (2.2 to >16 MPN/100mL). HPC were above 500 CFU/mL in 5 (5.6%) waters from community plastic tanks. In wells samples, the HPC ranged from <1 to 1.6x10(4) CFU/mL. The residual chlorine did not attend the standard established in the drinking water legislation (0.2 mg/L), except in 20 (22.5%) samples. These results confirm the vulnerability of the water supply systems in this peri-urban area what is clearly a public health concern.
authors.affiliation: Faculdade de Saúde Pública, Universidade de São Paulo , São Paulo, SP , Brasil.
authors.forename: Maria Tereza Pepe
authors.initials: MT
authors.lastname: Razzolini
authors.forename: Wanda Maria Risso
authors.initials: WM
authors.lastname: Günther
authors.forename: Francisca Alzira Dos Santos
authors.initials: FA
authors.lastname: Peternella
authors.forename: Solange
authors.initials: S
authors.lastname: Martone-Rocha
authors.forename: Veridiana Karmann
authors.initials: VK
authors.lastname: Bastos
authors.forename: Thaís Filomena da Silva
authors.initials: TF
authors.lastname: Santos
authors.forename: Maria Regina Alves
authors.initials: MR
authors.lastname: Cardoso
keywords: Clostridium perfringens; Enterococcus; Escherichia coli; drinking water; peri-urban area
references.citation: Rev Saude Publica. 2003 Aug;37(4):510-4
references.pmid: 12937713
references.citation: Salud Publica Mex. 2000 Sep-Oct;42(5):397-406
references.pmid: 11125624
references.citation: J Water Health. 2009 Mar;7(1):145-54
references.pmid: 18957783
references.citation: Rev Panam Salud Publica. 2000 Sep;8(3):172-80
references.pmid: 11036427
references.citation: J Water Health. 2004 Sep;2(3):201-14
references.pmid: 15497816
references.citation: Lancet Infect Dis. 2005 Jan;5(1):42-52
references.pmid: 15620560
references.citation: J Water Health. 2008 Jun;6(2):215-24
references.pmid: 18209284
references.citation: J Water Health. 2009 Mar;7(1):97-107
references.pmid: 18957778
references.citation: Appl Environ Microbiol. 1996 Jul;62(7):2201-11
references.pmid: 8779557
references.citation: J Water Health. 2004 Mar;2(1):1-13
references.pmid: 15384725
references.citation: J Water Health. 2005 Sep;3(3):259-70
references.pmid: 16209030