尽管有证据表明钙的无效性 腐蚀控制的碳酸盐方法， 碳酸钙的调整仍然是关键 主要的腐蚀控制策略。许多公用事业 仍然显著增加碱度（使用 有限或没有成功）或尝试以更高的成本运营 pH值低于必要值，作为 铅和铜的控制手段。 持续的高pH值是主要变量 在客户处控制铅和铜的释放 水龙头。pH值的变化程度 提出的建议必须在以下基础上仔细评估: 特定于现场的条件。旧金山 公用事业委员会（SFPUC）案 这里的分析表明 高pH值是更合适的腐蚀控制 处理符合铅和 铜规则（LCR）比调整 Langelier饱和指数或增广指数 碱度。水质的组合 以及SFPUC的配电系统状况 从游离氯到 氯胺对铅和铜没有影响 发布或LCR合规性。包括49个参考文献、表格、图表。

Despite the documented inefficacy of the calcium carbonate approach to corrosion control, adjustment of calcium carbonate remains the dominant corrosion control strategy. Many utilities still significantly increase alkalinity (with limited or no success) or try to operate at much lower pH values than necessary, both as a means of lead and copper control. Consistent high pH is the main variable controlling release of lead and copper at customer taps. The extent to which pH can be raised must be carefully evaluated on the basis of site-specific conditions. The San Francisco Public Utilities Commission (SFPUC) case profiled here demonstrates that maintaining a high pH is a more appropriate corrosion control treatment to comply with the Lead and Copper Rule (LCR) than adjusting the Langelier saturation index or augmenting alkalinity. The combination of water quality and distribution system conditions at SFPUC is such that a switch from free chlorine to chloramine did not affect lead and copper release or LCR compliance. Includes 49 references, tables, figures.