Seine-Maritime Seine-Maritime Seine-Maritime () is a department of France in the Normandy region of northern France. It is situated on the northern coast of France, at the mouth of the Seine, and includes the cities of Rouen and Le Havre. Until 1955 it was named Seine-Inférieure. The department can be split into three main areas: The département was created in 1790 as Seine-Inférieure, one of five departements that replaced the former province of Normandy. In 1800 five arrondissements were created within the département, namely Rouen, Le Havre, Dieppe, Neufchatel and Yvetot, although the latter two were disbanded in 1926. On 18
Seine concentrations in the Seine are relatively high. The pH level of the Seine at Pont Neuf has been measured to be 8.46. Despite this, the water quality has improved significantly over what several historians at various times in the past called an "open sewer". In 2009, it was announced that Atlantic salmon had returned to the Seine. The name comes from the Latin , the Gallo-Roman goddess of the river. On 28 or 29 March, 845, an army of Vikings led by a chieftain named Reginherus, which is possibly another name for Ragnar Lothbrok, sailed up the River Seine with