Instituto Adolfo Lutz, Centro de Laboratório Regional de Bauru, Núcleo de Ciências Químicas e Bromatológicas, Bauru, Brazil.
Instituto Federal de Educação, Ciência e Tecnologia do Triângulo Mineiro, Uberaba, Brazil.
Water Environ Res. 2019 Aug;91(8):805-812. doi: 10.1002/wer.1124. Epub 2019 May 6.
The public water supply is a constant subject of concern since its quality depends on many different factors. The intention of this paper was to evaluate the quality of the public water supply in 38 cities from the midwest region of the State of São Paulo, Brazil, during the year of 2016. The parameters investigated included free residual chlorine, pH, apparent color, turbidity, fluoride, nitrate, and the presence of total coliforms and Escherichia coli. In total, from the 2,897 samples of water under analysis, 545 (18.81%) samples conflicted with the country's current legislation. The highest rates of noncompliance were related to fluoride contents and the presence of total coliforms. In addition, high nitrate concentrations (>10 mg/L NO -N) were observed in one of the cities' water sample. Our data display the major critical points of the water offered to the population and expose the potential risks for human health, indicating the need of a regular surveillance of the water and the adoption of corrective and preventive measures, in order to avoid the waterborne diseases occurrence, thus contributing to the population's health improvement. PRACTITIONER POINTS: Approximately 20% of the unsatisfactory water samples. High nitrate concentrations in public supply water. Potential risks for human health.
公共供水一直是人们关注的焦点，因为其水质取决于许多不同的因素。本文旨在评估 2016 年巴西圣保罗州中西部 38 个城市的公共供水水质。调查的参数包括游离余氯、pH 值、表观颜色、浊度、氟化物、硝酸盐以及总大肠菌群和大肠杆菌的存在情况。在总共分析的 2897 个水样中，有 545 个（18.81%）样品不符合该国现行法规。不合格率最高的是氟化物含量和总大肠菌群的存在。此外，在一个城市的水样中还观察到高浓度的硝酸盐（>10mg/L NO3-N）。我们的数据显示了提供给居民的水的主要关键点，并暴露出对人类健康的潜在风险，表明需要对水进行定期监测，并采取纠正和预防措施，以避免水传播疾病的发生，从而促进人口健康的改善。
约 20%的水样不合格。
公共供水的硝酸盐浓度较高。
对人类健康存在潜在风险。
