• Greening
    the Pittsburgh
    Wet Weather Plan
  • Green
  • Long-Term
In 2004, PWSA entered into a Consent Order and Agreement with the Pennsylvania Department of Environmental Protection and the Allegheny County Health Department to reduce combined sewer overflows (CSO) throughout the City of Pittsburgh. By July 2013, the Authority must submit a Long Term Control Plan (LTCP) detailing the plans and objectives to ultimately bring the system into compliance with the requirements of the Federal Clean Water Act and the Pennsylvania Clean Streams Act.

While the ultimate extent and cost of this plan will not be known until it gains final approval, all parties agree that steps must be taken to reduce CSOs in order to protect the environment, public health, and the quality of life we enjoy in Pittsburgh. The protection of these resources and amenities is essential to maintaining both Pittsburgh’s position as one of the world’s most livable places, and as the region’s “green” leader.

Therefore, Mayor Ravenstahl has directed PWSA to “ensure that the version of its LTCP submitted to DEP fully consider, and where appropriate, maximize the use of green technologies, practices, and policies that will contribute to the reduction of wet weather flows into the combined sewer system. “

To that end, the PWSA is undertaking the Greening of the Pittsburgh Wet Weather Plan. The primary objective of this project is to develop a consensus approach to reviewing, recommending and incorporating a plan for the implementation of stormwater Green Infrastructure (GI) technologies and policies into the City of Pittsburgh\PWSA Wet Weather Feasibility Study. In order to reach that consensus, it will be necessary to explore and resolve issues relative to identifying and maximizing the Gl opportunities, describing and quantifying the benefits of Gl, and effectively addressing impediments to large scale Gl implementation.

PWSA will accomplish this by assembling a group of identified local and national experts and interested stakeholders into charrettes tasked with exploring the major issues that are critical to defining the role of stormwater Gl in the City of Pittsburgh, and providing a framework of specific recommendations and action items in the Wet Weather Feasibility Study through which that role can be achieved. The findings of the GI Charrette will constitute a report that summarizes the discussions, conclusions and recommendations and present a list of action items. This information will be incorporated into the City of Pittsburgh/PWSA Wet Weather Feasibility Study to be submitted in July 2013.

Join the Green Infrastructure Technical Advisory Committee

The Pittsburgh Water & Sewer Authority is actively seeking members of the community with specialized knowledge and expertise in the fields of Stormwater Management, Landscape Architecture & Design, Ecological Preservation/Restoration, Community Development, Urban Issues and Public Policy to serve on our Green Infrastructure Technical Advisory Committee. Click here to download the Membership Application  




The first of three Charrettes focused on setting the green infrastructure stage by bringing together local and national experts to work together on identifying the green infrastructure technologies that should be considered in the PWSA Wet Weather Plan.

Presentations & Notes:

Meeting Notes - Charrette 1

Green Infrastructure Planning in Pgh - Charrette 1

URS - Overcoming GI Barriers in other cities - PWSA Charrette 1



The second Charrette focused on a discussion of the benefits and potential challenges of green infrastructure – including how to quantify those benefits and overcome those challenges.

Presentations & Notes:

Summary of Input from Charrettes 1 & 2

Map of Suggested Pilot Projects



The third Charrette will address the range of opportunities and contemplate the legal, institutional, and financial issues associated with implementing green infrastructure as part of the Wet Weather Plan.

Presentations & Notes:

Green Infrastructure & Adaptive Management Presentation





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