The New Meadows River is a long, narrow tidal embayment located in the northeastern corner of Casco Bay, Maine. It is not technically a river, as it receives very little freshwater flow; salinity levels are close to that of the open ocean. Its 23-square-mile watershed spans parts of Phippsburg, West Bath, Brunswick, Harpswell, and Bath, and remains a relatively undeveloped area within the region, known for its natural beauty and productive shellfisheries. The waterbody features a varied topography with rich glacial sediment, supporting diverse marine life. The bottom is primarily mud, providing good holding ground for boats, though navigators must be cautious of large rocks in certain areas. While water quality is generally good, some northern areas and the connected lakes can experience low dissolved oxygen levels during warmer months.