The use of electrocoagulation and enhanced media filtration was evaluated for the treatment of storm water runoff from shipyards. A 15-gallon per minute (gpm) fieldscale unit was operated at Litton Avondale Industries Shipyard in New Orleans, Louisiana. The study indicated that electrocoagulation and enhanced media filtration is a cost-effective technology for treatment of shipyard storm water runoff. This technology is simple to operate and has the potential to provide a cost-effective means to treat various process wastewaters generated in shipyards. The study also indicates a need for further research on the management of solid residuals generated in the treatment process. Further research is also needed to assess the effectiveness of this technology for the treatment of other related waste streams such as ship ballast water and bilge water.