Performance Standards

All of the Bay states are shifting to a new paradigm for managing urban stormwater runoff from both new development and redevelopment projects. The new paradigm is reflected in new performance standards that require greater levels of stormwater treatment using Low Impact Development (LID) and site design practices to mimic predevelopment hydrologic conditions.

In early 2012, an Expert Panel was convened to review all of the available science on the pollutant removal performance and runoff reduction capability of BMPs that are used to comply with the new state-wide performance standards for new development and redevelopment for all of the States and jurisdictions in the Bay watershed. As of October 9, 2012 the panel’s final recommendations were approved by the ¬†Water Quality Goal Implementation Team – great job panelists!

Also, don’t forget to check out our newly developed Stormwater Practices for New and Redevelopment Projects “Fact Sheet” which breaks down the practice and the expert panel recommendations into delicious bite-size pieces…yum, yum, enjoy!

U-2 Stormwater Practices for New and Redevelopment Projects Fact Sheet

A 'fact sheet' on using Stormwater Practices for New and Redevelopment Projects in the Chesapeake Bay Watershed.

Version june 2015 | Size (565 KB) | File type (.pdf) | Download

Photo Credit: Chesapeake Bay Program

New State Stormwater Performance Standards Final Report(s)

Final Expert Panel Report on Stormwater Performance Standards (Short Version)

Final CBP Approved Expert Panel Report on Stormwater Performance Standards Short Version

Version short, january 20, 2015 | Size (932 KB) | File type (.pdf) | Download

Final CBP Approved Expert Panel Report on Stormwater Performance Standards (Long Version)

Final CBP Approved Expert Panel Report on Stormwater Performance Standards with Appendices

Version long, january 20, 2015 | Size (2 MB) | File type (.pdf) | Download

Frequently Asked Questions for Stormwater Performance Standards and Retrofit Expert Panel Reports

This is a companion document to the expert panel reports on on the retrofit and performance standards expert panel reports that clarifies how the practices will be credited, identifies who the state stormwater contacts are, outlines the reporting and tracking requirements for NEIN and Scenario Builder, corrects errata, and provides any state-specific decisions/interpretations on how the reports are to be properly used.

Version may 25, 2015 | Size (521 KB) | File type (.pdf) | Download

Training Resources

The following training resources have been created for explaining the panel recommendations – enjoy!

[Webcast] Crediting BMPs Used for New and Redevelopment