"A federal appeals court in New York ordered the government to rewrite its rules regulating the discharge of ballast water by ships, in a victory for environmental groups that said the rules were too lenient and threatened the nation's waterways.

The 2nd U.S. Circuit Court of Appeals on Monday said the Environmental Protection Agency acted 'arbitrarily and capriciously' when it decided in 2013 to follow an international standard governing the discharge of harmful organisms, though technology was available to adopt a higher standard.

Writing for a 3-0 appeals court panel, Circuit Judge Denny Chin also said the EPA, using its authority under the Clean Water Act, should have considered onshore facilities to treat ballast water rather than focus on pollution controls aboard ships, where a lack of space might limit their effectiveness."

Jonathan Stempel reports for Reuters October 5, 2015. [2]