The global market for BWT systems is predicted to grow to over $34 billion through 2020 in response to IMO and USCG-based ballast water discharge regulations (Frost and Sullivan, 2012). BWT systems are now manufactured by dozens of companies around the world, including traditional suppliers of marine equipment, suppliers of municipal water and wastewater treatment equipment, and shipbuilders. As of November 2013, 35 BWT systems have received IMO-type approval from foreign administrations, and 28 of these have been accepted into the AMS program by the USCG.