CarquefouCarquefou is a commune in the Loire-Atlantique, department in the region Pays de la Loire, in western France.WWW carquefou.frEconomyThe headquarters of the geophysical research company Sercel is located in Carquefou.SportIn 2008, the local football team Union Sportive Jeanne d'Arc Carquefou reached the quarter-finals of the French Cup after a win over the 8-times national champions Olympique de Marseille on 19 March, putting the town in the national headlines.