The estuary of this river is heavily polluted with effluents released by the industries in the region.[85] Adyar and Cooum rivers are heavily polluted with effluents and waste from domestic and commercial sources, the Coumm being so heavily polluted it is regarded as the city's eyesore.[86][87] A protected estuary on the Adyar forms a natural habitat for several species of birds and animals.[88] The Buckingham Canal, 4 km (2.5 mi) inland, runs parallel to the coast, linking the two rivers.