在弗吉尼亚州，威廉王子县服务管理局（Prince William County Service Authority）将水和下水道服务的可变收入和固定收入都基于一个从单户住宅的历史平均日用水量得出的系数。等效住宅单元一览表（ERU）将商业和公共设施的类型与单个家庭住宅的平均使用量联系起来。该时间表适用于按比例分摊容量的初始费用以及持续的每月服务费。这一概念似乎比基于等效电表的收费更公平。 描述了水和下水道系统成本的各种类别。还讨论了资本融资-资本改善计划和折旧准备。包括表格、数字。

In Virginia, the Prince William County Service Authority is basing both variable and fixed revenues for water and sewer services on a factor derived from the historical average daily water usage of singlefamily residences. A schedule of equivalent residential units (ERUs) relates types of commercial and public facilities to the average usage of a single-family residence. The schedule is applied to initial fees for a proportionate share of capacity as well as ongoing monthly service charges. The concept appears to result in more equitable charges than those based on equivalent meters. The various categories into which water and sewer system costs are placed are described. The capital financing - capital improvements program and the depreciation reserve are discussed also. Includes tables, figures.