EPA has a website that documents case studies on green infrastructure. Link to: Green infrastructure case studies web page.
EPA also has published a report presenting case studies of how 12 local governments developed and implemented policies for managing stormwater using green infrastructure. Examples of policy approaches include capital and transportation projects, stormwater regulation, demonstration and pilot projects, stormwater fee discounts, and other incentives. The report is intended to serve as a policy guide for municipalities, and includes descriptions of the most common and influential policies; background on how each policy approach works; and examples from the case studies about results, barriers, and processes for implementation. For more information, link to Green Infrastructure Case Studies: Municipal Policies for Managing Stormwater with Green Infrastructure.