这项分两个阶段的研究首先调查了隐孢子虫 贾第虫浓度和经典水质参数（总大肠菌群、粪便） 大肠菌群、大肠杆菌、浊度、温度、pH值、溶解有机碳（DOC）、硝酸盐、河流水位） 温哥华区的西摩水系统，这是一个受保护的流域系统 温哥华，不列颠哥伦比亚省。然后，研究调查了与水的关系 南部Lethbridge Oldman河的质量参数，包括河流流量 阿尔伯塔省是一个半干旱的流域系统，严重受农业生产的影响。 人群对隐孢子虫抗体标记物的血清阳性率和病例数 向公众健康报告的隐孢子虫病以及西摩分水岭事件， 温哥华也接受了检查。 收集的以下流域、水源和相关数据包括: 降水 浑浊度； 粪便大肠菌群； 总大肠菌群； 大肠杆菌酸碱度； 流量（河流）； 流域事件（如滑坡）； 硝酸盐； 温度 博士；和 贾第虫囊肿和隐孢子虫卵囊的浓度。包括4个参考文献、表格和图表。

This two-phased study first investigated the association between Cryptosporidium and Giardia concentrations and classic water quality parameters (total coliforms, fecal coliforms, E. coli, turbidity, temperature, pH, dissolved organic carbon (DOC), nitrates, river levels) in the Greater Vancouver District's Seymour water system, which is a protected watershed system in Vancouver, British Columbia. Then, the study investigated the association with water quality parameters, including river flows, in the Oldman River, at Lethbridge in Southern Alberta, which is a semi-arid watershed system heavily impacted by agricultural production. Population seropositivity to antibody markers of Cryptosporidium and number of cases of cryptosporidiosis reported to public health as well as watershed events in Seymour, Vancouver were also examined. The following watershed, source water and related data collected included: precipitation; turbidity; fecal coliforms; total coliforms; E. coli; pH; flows (river); watershed events (eg. land slides); nitrates; temperature; DOC; and, concentrations of Giardia cysts and Cryptosporidium oocysts. Includes 4 references, tables, figures.