 The community of Mossville is located in between Westlake and Sulphur across the Calcasieu River from the city of Lake Charles in Calcasieu Parish, Louisiana.Forty of the fifty-three industrial facilities in Calcasieu Parish are located within 10 miles of Mossville.These facilities represent the largest concentration of vinyl plastic manufacturers in the U.S., a coal-fired power plant, oil refineries, and chemical production facilities.