Developing Ballast Water Standards to Protect Against Aquatic Invasive Species – New Report


The uptake and release of ballast water and sediments by ships is a predominant way that non-native aquatic invasive species are introduced to ecosystems around the world.  Increasing world trade and several prominent species invasions from ballast water, such as European zebra mussels in the Great Lakes, have prompted international interest in ballast water management.  In particular, both the U.S. Coast Guard and U.S. Environmental Protection Agency are developing standards limiting the density of organisms in ballast water released to U.S. waters. 


ASSESSING THE RELATIONSHIP BETWEEN PROPAGULE PRESSURE AND INVASION RISK IN BALLAST WATER, a new report from the National Research Council, examines the available methods for deriving a numeric standard for ballast water discharge, including exploring the variables that determine whether a species could become a successful invader.  The authoring committee did not propose numeric discharge standards.


Reporters who wish to obtain copies of the report should contact the Office of News and Public Information, tel. 202-334-2138 or e-mail  Advance copies will be available to reporters only starting at 4 p.m. EDT on Wednesday, June 1. THE REPORT IS EMBARGOED AND NOT FOR PUBLIC RELEASE BEFORE 11 A.M. EDT ON THURSDAY, JUNE 2.