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How much foreign ballast water is dumped in the United States?

April 26, 2017ballast dumped foreign united states water

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How much foreign ballast water is dumped in the United States?

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A. Estimates are that ships pump more than 21 billion tons of ballast water into U.S. waters every year; that is, 40,000 gallons a minute or nearly 700 gallons a second. One ship alone can carry up to 10 million gallons of ballast water.