St. Tammany Parish’s history was greatly influenced by the abundant sources of water within the parish. Artesian water is the key ingredient in two thriving parish products – Abita Water and Abita Beer. In 1956 the Lake Pontchartrain Causeway was completed.Today St. Tammany is one of the fastest growing parishes in Louisiana. There are 9 towns in St. Tammany Parish: Abita Springs, Bush, Covington, Folsom, Lacombe, Madisonville, Mandeville, Pearl River and Slidell.