Baldy Mesa Water区为美国约15000人供水 加利福尼亚州维克多维尔附近的高沙漠。该地区目前依赖地下水 从九口井抽水。测得的水井中的砷浓度在 从十亿分之五到百分之二十（ppb），所有的油井都经历了 浓度高于10 ppb的新MCL。除了水质 挑战，地下水盆地处于透支状态，法院批准 裁决限制了流域内用户允许的地下水抽水。到 供水压力进一步加大，住宅开发正以前所未有的速度进行 在该地区的服务区收费。 该地区开始实施供水计划，以评估他们面对这些问题的选择 挑战。这些选择包括地下水处理、处理过的和未处理的混合 地下水，以及从州供水局引入新的地表水供应 项目随着该地区的不断发展，地表水供应将更加可行 增加，甚至取代该地区的供水，尽管这是一个新的水源 带来了自身的水质挑战，包括味道、气味和消毒副产品。 对于地下水砷处理，该地区评估了各种处理方案 （包括IX、GFH和混凝辅助过滤）和处理设施 配置，包括单独的井口处理、半集中处理和 集中治疗。SWP处理工艺的选择取决于味道和气味 和DBP控制。评估的技术包括臭氧氧化和生物降解 活性过滤器、压载沉淀（含PAC）和介质过滤（含PAC） 可选的GAC帽）和膜，然后进行紫外线/过氧化氢氧化。 如何结合两种截然不同的水源，提供最佳的 对法规遵从性和消费者满意度的处理是最终的解决方案 挑战这个地区。该地区采用了主动供水的概念 质量管理计划（PWQMP），以确保该地区的供水处于正常状态 全面遵守短期和长期法规。PWQMP考虑到 考虑SDWA合规性的考虑因素（如DBP、砷、铅）& 铜规则），同时遵守（各种处理技术的影响 以及两个水源之间的各种混合比例），水质保证美观 （如T&O），以及未来可能的监管。 供水计划正在定稿并提交给区议会 请董事批准。它为该地区提供了最具成本效益的解决方案 在缺水的环境中，需求不断增加，监管更加严格。 本文将介绍本项目中使用的具体PWQMP。评估 不同的处理技术和每种处理策略的相关成本 还将介绍这两种水源。仅包含摘要。

The Baldy Mesa Water District serves water to approximately 15,000 people in California's High Desert near Victorville. The District currently relies on groundwater pumped from nine wells. The measured arsenic concentrations in the wells have ranged from 5 to 20 parts per billion (ppb), and all of the wells have experienced As concentrations higher than the new MCL of 10 ppb. In addition to the water quality challenge, the groundwater basin is in a state of overdraft, and a court-approved adjudication limits the allowable pumping of groundwater by users in the basin. To further stress water supplies, residential development is occurring at an unprecedented rate in the District's service area. The District embarked on a water supply plan to evaluate their options in the face of these challenges. The options included groundwater treatment, blending of treated and raw groundwater, and the introduction of a new surface water supply from the State Water Project. As the District continues to grow, a surface water supply will be more feasible to augment, or even to replace the District's water supply, although this new water source brings its own water quality challenges, including taste and odor and disinfection byproducts. For groundwater arsenic treatment, the District has evaluated various treatment options (including IX, GFH, and coagulation assisted filtration) and treatment facility configurations, including separate well-head treatment, semi-centralized treatment, and centralized treatment. The selection of SWP treatment process is hinged on Taste & Odor and DBP control. The technologies evaluated include ozonation followed by biologically active filters, ballasted sedimentation (with PAC) followed by media filtration (with optional GAC cap), and membranes followed by UV/peroxide oxidation. How to combine two distinctively different water sources and provide the optimal treatment for regulatory compliance as well as for consumer satisfaction is the ultimate challenge to the District. The District has adopted the concept of a Proactive Water Quality Management Plan (PWQMP) to ensure that the District's water supply will be in full compliance with both short-term and long-term regulations. The PWQMP takes into account the considerations of SDWA compliance (such as DBPs, Arsenic, Lead & Copper Rule), simultaneous compliance (the impact of various treatment technologies and various blending ratios between two water sources), aesthetic water quality assurance (such as T&O), and potential future regulations. The water supply plan is being finalized and presented to the District's Board of Directors for approval. It lays out the most cost-effective path for the District to meet increasing demands and more stringent regulations in a water-scarce environment. This paper will present the specific PWQMP used in this project. The evaluations of various treatment technologies and the associated cost for each treatment strategy for both water sources will also be presented. Includes abstract only.