The US EPA proposed new regulations on November 3rd that would require overseas ships to install treatment systems for ballast tanks. The treatments would kill at least some of the thousands of fish, mussels, and microorganisms that are transported into US waters in ballast water every year. The proposals have been criticized by some environmental groups, which claim that the new regulations are not stringent enough and would not take effect on all vessels for up to 10 years.
Read more:
Washington Post: EPA proposes standards for cleansing ship ballast water, leading pathway for invasive species
Kansas City Star: Ship ballast rule geared to protect Great Lakes gets mixed reviews