在美国，为大城市服务的供水商经常面临向城市范围外快速增长的地区提供服务的问题。创新的方法对于筹集所需的资金是绝对必要的。在许多情况下，供水、处理设施和分配系统的联合开发允许所有机构利用较大实体的融资能力，提供规模经济，并避免人口从中心城市转移到边远地区的一些有害影响。包括表格，数字。

Water purveyors that serve large cities in the United States are often faced with providing service to rapidly growing areas outside the city limits. Innovative methods are definitely necessary to raise the needed capital. In many cases, joint development of water supplies, treatment facilities, and distribution systems allows all the agencies to take advantage of the financing capacity of the larger entity, provides economy-of-scale, and avoids some of the harmful effects of population shifts from central cities to outlying areas. Includes table, figures.