Enns (town) are used for agriculture. The municipality can be subdivided into the districts of Einsiedl, Enghagen, Enghagen am Tabor, Enns, Ental, Erlengraben, Hiesendorf, Kottingrat, Kristein, Kronau, Lorch, Moos, Rabenberg and Volkersdorf. The first settlements in the area of the mouth of the Enns river to the Danube date back to 4,000 years ago. Celts settled the land around 400 BC. Their kingdom of Noricum was incorporated into the Roman Empire in AD 15 and was designated as a Roman province under the reign of Emperor Claudius in AD 45. In the second and third century, the Roman camp of "Lauriacum", in
Citizens United to Protect the Maurice River and Its Tributaries, Inc. report by the National Wild and Scenic River Study states that “[t]he study area functions as critical migration-related habitat for shorebirds, songbirds, waterfowl, raptors, rails and fish. The Maurice River and its tributaries drain the Southwest portion of the Pinelands National Reserve, which is also an International Biosphere Reserve under the United Nations Man and Biosphere Program.” The New Jersey Landscape mapping indicates the Maurice River watershed as habitat for bald eagles, waterfowl, and several other migratory birds. In addition, the area contains the world’s largest population of "Aeschynomene virginica", (sensitive joint vetch). Its NatureServ Conservation Status is G2, globally