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Originally Posted by Botnst
"Bilge water" -- that's not a lot of water and originates within the vessel. PThe worst contaminants from bilge water are usually hydrocarbons. Bilge water disposal is regulated in most ports.
robably what you mean is ballast water. Ballast is pumped on board to trim the ship as cargo is loaded, unloaded or shifted or as fuel is burned. It is taken on as-needed and could be fresh or brackish or straight seawater. It's mostly unregulated.
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Generally correct but I believe bilge and ballast water is highly regulated in the Great Lakes. How much it is enforced, well who knows.
Unfortunately this was in response to several non-natavie species believed to have been introduced into the Great Lakes via ballast water.
The Sea Lamprey and Zebra mussels primarily.