The Institute for Sustainable Infrastructure (ISI) Envision rating system as been around for about five years and is gaining traction as the premier sustainability rating system for the wastewater industry. ISI was founded by the American Public Works Association (APWA), the American Society of Civil Engineers (ASCE), and the American Council of Engineering Companies (ACEC) and operates under their oversight. ISI collaborated with the Zofnass Program for Sustainable Infrastructure at the Harvard University Graduate School of Design to develop Envision.
Envision is a rating system for sustainable infrastructure. It measures a project’s impact on the surrounding community and environment plus technical considerations regarding materials and processes while providing a framework for discussing sustainability decisions with project stakeholders and community. Not only is it a planning and design tool, it also is a means of evaluating completed infrastructure projects.