The companies decline to give specific capacities for their individual plants.
Most plants produce a range of fluorocarbons.
AlliedSignal closed its Danville, Ill., facility in 1995. AlliedSignal will double its capacity at Geismar, La., to 30 million pounds per year by the end of 1999. DuPont will increase production at Corpus Christi, Tex., raising the site's fluorocarbon capacity by 5 percent in 1999. ICI Americas will raise its St. Gabriel, La., capacity for HFC-134a by another 22 million pounds per year by 2001. A range of products traverse the US-Mexican border in both directions.