by Lee Bergquist, Milwaukee Journal Sentinel

The U.S. Senate on Wednesday approved a measure that would require the Environmental Protection Agency to set rules requiring that ocean-going ships entering the Great Lakes treat ballast water before the water is released into the lakes.

The new policy is contained in a funding bill for the U.S. Coast Guard, and it comes after conservationists and the shipping industry have sparred for years over regulation of ballast water, a pollutant.

Under the measure, the  EPA would regulate ballast water and the Coast Guard would enforce the rules.

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