本专栏讨论美国环境保护署的基石报告 制定一项计划，解决升级项目的关键投资需求 美国老化的水和废水基础设施。被称为1999年的酒会 水基础设施需求调查（DWINS）报告得出结论，国家 55000个社区供水系统（CWSs）和21400个非营利非社区 未来20年，水系统（NCWSs）将至少需要花费1509亿美元 为符合饮用水国家循环基金条件的项目支付的年数 （DWSRF）协助确保提供安全饮用水。本报告构成 修正公式的依据，该公式确定每个州每年的收入 在未来四年中，联邦政府将为他们的DWSRF提供资金支持。除了识别 在未来20年的总需求数字中，1999年的德温报告打破了这些数字 根据系统的规模和类型，以及系统的类型，分析当前和未来的需求 基础设施改进，需要实现并保持对现有基础设施的遵守 以及各个州和地区即将出台的SDWA法规 作为印第安人和阿拉斯加州原住民社区。包括桌子。

This column discusses the US Environmental Protection Agency's cornerstone report for constructing a plan to address the critical investment need to upgrade the nation's aging water and wastewater infrastructure. Called the 1999 Drinking Water Infrastructure Needs Survey (DWINS), the report concludes that the nation's 55,000 community water systems (CWSs) and 21,400 not-for-profit noncommunity water systems (NCWSs) will need to spend at least $150.9 billion over the next 20 years to pay for projects eligible for Drinking Water State Revolving Fund (DWSRF) assistance to ensure delivery of safe drinking water. This report forms the basis for revising the formula that determines how much each state receives in annual federal grants to capitalize their DWSRFs for the next four years. Besides identifying a total needs figure for the next 20 years, the 1999 DWINS report breaks the numbers down into current and future needs, needs by size and type of system and by type of infrastructure improvement, needs to achieve and maintain compliance with existing and forthcoming SDWA regulations and by individual states and territories as well as American Indian and Alaska Native communities. Includes tables.