EPA's combined sewer overflow (CSO) program has reached a mature stage. Some communities have completed their CSO controls, while others are in the process of constructing controls or evaluating potential alternatives. With the recent emphasis on green infrastructure, some communities
are evaluating the role of natural systems and ecological processes in Long Term Control Plans (LTCPs) for controlling CSOs. The convergence of these critical milestones and issues for the national CSO program highlights the need for updated tools and guidance to facilitate future CSO control
efforts. In response, EPA is developing guidance on post construction compliance monitoring for CSOs, as well as the Green LTCP-EZ, a tool that allows small CSO communities to incorporate green infrastructure as part of their LTCP efforts. This paper discusses these initiatives serves as outreach
to CSO communities on these efforts.
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