最近法规和处理技术的变化要求阿尔瓦拉多过滤厂（加利福尼亚州圣地亚哥）必须升级。虽然最初的工厂曾被认为是最先进的处理设施，但需要进行重大的翻修和修复项目，以确保工厂能够满足城市21世纪的水质和处理目标、容量要求和运营需求。对扩建、改造和翻新项目进行了说明。

Recent changes in regulations and treatment technologies dictate that the Alvarado Filtration Plant (San Diego, California), must be upgraded. Though the original plant was once considered to be a state- of-the-art treatment facility, a major renovation and rehabilitation project is needed to ensure that the plant will be able to meet the City's 21st Century water quality and treatment goals, capacity requirements, and operational needs. The expansion, rehabilitation, and renovation project description is given.