加利福尼亚州卫生服务部（DHS）已经制定了解决这一问题的条例草案 利用再生水补给地下水。认识到需要移除或减少 城市污水中可能存在的健康重要有机成分的浓度， DHS选择总有机碳（TOC）作为再生水中的监测参数。这个 TOC要求的目的是将提取水中废水来源的TOC限制在 最大浓度为1 mg/L。在补给点或含水层中稀释也需要限制 再生水的最大贡献率为50%，除非确定方法并证明 与1:1稀释一样有效。本文探讨了稀释要求问题的两个核心问题 这篇论文。TOC小于或等于1 mg/L的再生水能否可靠生产？是否符合TOC限制 在回灌点，再生水中小于或等于1 mg/L的浓度可提供同等水平的健康保护 达到再生水中TOC小于或等于2 mg/L的限值，并将其与非废水水1:1混合 起源本文的目的不是提倡消除稀释 间接饮用水再利用再生水的地下水补给规定。目的是 建议增加可纳入法规的替代治疗方法 从健康的角度来看，生产的再生水至少相当于具有 废水来源的TOC浓度相同。包括43个参考文献和表格。

The State of California Department of Health Services (DHS) has developed draft regulations addressing groundwater recharge with reclaimed water. In recognition of the need to remove, or reduce the concentrations of health-significant organic constituents that may be present in municipal wastewater, DHS has selected total organic carbon (TOC) as a parameter to be monitored in the reclaimed water. The intent of the TOC requirement is to limit the TOC of wastewater origin in the extracted water to a maximum of 1 mg/L. Dilution, either at the point of recharge or in the aquifer, is also required to limit the maximum reclaimed water contribution to 50% unless methodology is identified and demonstrated to be as effective as a 1:1 dilution. Two questions central to the dilution requirement issue are explored in this paper. Can reclaimed water having less than or equal to 1 mg/L TOC be reliably produced? Does meeting a TOC limit of less than or equal to 1 mg/L in the reclaimed water at the point of recharge provide a level of health protection equivalent to meeting a TOC limit of less than or equal to 2 mg/L in the reclaimed water and blending it 1:1 with water of non-wastewater origin? The purpose of this paper is not to advocate elimination of the dilution requirement in the draft groundwater recharge regulations for reclaimed water used for indirect potable reuse. The intent is to suggest addition of an alternative method of treatment that could be included in the regulations to produce reclaimed water that, from a health standpoint, is at least equivalent to blended water having the same TOC concentration of wastewater origin. Includes 43 references, tables.