服务于大温哥华水区（GVWD）的三座水库定期出现高浊度事件，这是一种具有攻击性的低pH成品水，以及对贾第鞭毛虫可能性的担忧，导致该地区开始实施水质改善计划（WQIP），以1）改善消毒过程，2）实施腐蚀控制设施，3）实施多屏障治疗概念以控制贾第鞭毛虫。该地区的改善计划范围很大。详细介绍了用水需求、水源水质、水质问题、水传播疾病、细菌再生、高浊度、管道腐蚀、管理计划的三个阶段、腐蚀控制替代方案、消毒实践和处理流程。

Periodic high turbidity events in the three reservoirs servicing The Greater Vancouver Water District (GVWD), an aggressive low pH finished water, and concern regarding the potential for Giardia has caused the District to proceed with a Water Quality Improvement Plan (WQIP) to 1) improve the disinfection process, 2) implement corrosion control facilities, and 3) implement a multi-barrier treatment concept for Giardia control. The scope of the District's improvement plan is substantial. Water demands, source water quality, water quality concerns, waterborne diseases, bacterial regrowth, high turbidity, pipeline corrosion, the three phases of the management plan, corrosion control alternatives, disinfection practices, and treatment processes are detailed.