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Evaluation of microbiological and physicochemical conditions of water from home and building reservoirs: the importance of the quality of such water in the public health context

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Author(s):
Fabiana Cristina Julião
Total Authors: 1
Document type: Doctoral Thesis
Press: Ribeirão Preto.
Institution: Universidade de São Paulo (USP). Escola de Enfermagem de Ribeirão Preto (PCARP/BC)
Defense date:
Examining board members:
Susana Segura Muñoz; Adalberto Farache Filho; José Luiz Negrão Mucci; Maria José Bistafa Pereira; Angela Maria Magosso Takayanagui
Advisor: Susana Segura Muñoz
Abstract

Issues related to the monitoring of the quality of water destined for human consumption have been a concern around the world. The public water supply infrastructure was improved in Brazil at the beginning of the 19th century, however intermittent water supply requires the use of water reservoirs to meet the demand of daily consumption, especially in urban areas. Reservoirs can ensure the quantity of daily water requirements, but a lack of minimum care concerning cleaning and maintenance of such reservoirs may threaten the quality of water to be consumed. This study evaluated the microbiological and physiochemical conditions of water in the reservoirs of 217 houses and 23 Primary Health Units in Ribeirão Preto, SP, Brazil to obtain information concerning the sanitary condition of water consumed after storage, as well as actions on the part of the population related to the maintenance of domestic reservoirs. Bacteriological analyses were performed using the Multiple Tube method with a chromogenic substrate; parasitological analysis based on spontaneous sedimentation and analysis of metals through Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS). The data collections revealed that the population is aware of the need to clean house reservoirs. However, they do not perform it within the recommended period, even though they use the water stored for personal hygiene and domestic cleansing. The results of the analyses and statistical tests revealed values that fall within the parameters recommended by Ministry of Health Decree 518/2004. The water in the city comes from an underground spring and the company responsible for the city\'s public supply monitors its characteristics periodically; factors that collaborate in the maintenance of the quality of the water supplied in Ribeirão Preto, SP, Brazil. The routine use of water from the reservoir reduces the storage time keeping appropriate sanitary conditions. The population, though, needs to be regularly sensitized of the importance of cleaning and maintaining this reservoir to ensure safe water consumption and to avoid risks to the health of population. (AU)