The following two documents include a SAB report and its response evaluating the status of ballast water treatment technologies. The July 2011 report found that systems exist to meet the International Maritime Organization (IMO) standard, and some of those systems may achieve a limit 10 times the IMO standard. However, due to the detection limitations of current monitoring technology and approaches, the SAB could not definitively determine whether systems could meet this more stringent limit. 

• Efficacy of Ballast Water Treatment Systems: a Report by the EPA Science Advisory Board (SAB) (PDF)(154 pp, 1 MB)
• EPA's August 2011 response to the SAB study (PDF)(4 pp, 188 K)