这项研究的主要目的是 制定一种方法来评估市政饮用水设施对致病性微生物污染的相对脆弱性。具体目标包括: 确定和量化指标，以评估饮用水设施易受病原微生物污染的脆弱性； 根据饮用水微生物污染的相对脆弱性，对研究中的饮用水设施进行分类；和 评估将所得方法应用于拟议指标的可行性。与方法学相关的主题包括:研究区域； 选择饮用水设施； 指标制定和分类； 数据采集；和 数据处理。结果和讨论中概述的主题包括:饮用水设施（DWU）描述； 每个DWU的微生物风险值； 模型验证； 敏感性分析；和 可行性分析。

The main objective of this research was to develop a methodology to evaluate the relative vulnerability of municipal drinking water utilities to pathogenic microbiological contamination. Specific objectives included: to identify and quantify indicators to evaluate the vulnerability of drinking water utilities to contamination by pathogenic microorganisms; to classify the drinking water utilities under study according to their relative vulnerability to microbiological contamination of drinking water; and, to evaluate the feasibility of applying the obtained methodology to the proposed indicators. Topics covered related to methodology included: region under study; selection of drinking water utilities; indicators development and classification; data acquisition; and, data treatment. Topics outlined under results and discussion include: drinking water utility (DWU) description; Microbiological Risk Value for each DWU; Model Validation; Sensitivity analysis; and, Feasibility analysis.