Zebra mussels are a problem in Northern America's Great Lakes region because they reproduce fast. They colonize water supply pipes of hydroelectric and nuclear power plants, public water supply plants, and industrial facilities. As a result, they clog water sources. They colonize pipes constricting flow, therefore reducing the intake in heat exchangers, condensers, fire fighting equipment, and air conditioning and cooling systems. It is estimated that zebra mussels will continue to populate the Great Lakes and even enter the Mississippi River region. 