EPA is committed to promoting sustainable practices that will help ensure that citizens continue to enjoy the benefits of clean and safe water. Guided by the 
Agency’s Clean Water and Drinking Water Infrastructure Sustainability Policy, EPA is working with a broad group of stakeholders to help bring about more sustainable practices on three levels.
· Sustainable Water Infrastructure—Sustaining the collection and distribution systems, treatment plants and other infrastructure that collects, treats and delivers water-related services.
· Sustainable Water Sector Systems—Sustaining all aspects of the utilities and systems that provide water-related services.
· Sustainability Communities—Promoting the role of water services in furthering the broader goals of the community.
Each of these levels supports the others. The effective management of water infrastructure is one of the main challenges faced by our water sector systems. Our water sector systems must also address a range of other challenges to ensure their operations and infrastructure are sustainable. Sustainable infrastructure and systems are essential to ensuring the environmental and economic sustainability of communities throughout the nation. Learn more here.
Source: EPA.gov