犹他州四大供水系统的数据 用于评估监测的有效性 用大肠杆菌代替隐孢子虫 评估水源水对隐孢子虫的脆弱性 卵囊。在地理区域 据此间报道，参与的水务公司 得出的结论是，监测 大肠杆菌等细菌无法提供可靠的信息 关于致病性疾病发生的信息 隐孢子虫等生物。 代孕，虽然分析成本更低， 可能无法很好地表明 接触目标病原体。供水商 可能想考虑的结果是 在他们寻找答案时，这里有详细的说明 关于他们自己的水源和未来 从成本的角度来看 以及治疗的水平 必修的。对于公用事业，尤其是小型系统， 对病原体的监测可能是必要的 比粪便监测更昂贵 但细菌可以在 降低对公共健康的风险，提高 心境平和。包括27个参考文献、表格和图表。

Data from four large water systems in Utah were used to assess the validity of monitoring for Escherichia coli in lieu of Cryptosporidium to assess source water vulnerability to Cryptosporidium oocysts. In the geographic area reported on here, the participating water utilities concluded that monitoring for the occurrence of bacteria such as E. coli would not provide reliable information about the occurrence of pathogenic organisms such as Cryptosporidium. Surrogates, though cheaper to analyze for, may not provide a good indication of the exposure to target pathogens. Water providers may want to consider the findings that are detailed here as they look for answers about their own source water and future requirements, both from a cost perspective and the level of treatment that will be required. For utilities, especially small systems, monitoring for pathogens may be more expensive than monitoring for fecal bacteria but could pay off in terms of reduced risk to public health and greater peace of mind. Includes 27 references, tables, figures.