On-board water treatment is next line of defense against invasion

<> On-board water treatment is next line of defense against invasion - The WI Department of Natural Resources expects to begin enforcing the new requirements in the state's ports some time this year, as soon as the U.S. Coast Guard and International Maritime Organization complete final technical and legal details that will allow state and federal regulations to take effect -- treatment equipment adds about $500,000 to the cost of a new ship -- costs twice as much to retrofit a ship with the equipment