Hemlingsån is a river system with high natural values. The river is a forest stream that flows into Gideålven in Hemling. The Hemlingsån's course is varied with shorter rapids, alternating with seal sections and lakes. By Swedish standards, the river system is relatively unaffected by exploitation, but has previously been used as a waterway and raft cleaning has been carried out on certain sections. The surroundings around the river are dominated by woodland and marshland, several of which have high natural qualities. During the winter, you often see traces of otters, and it is precisely to protect the otter's habitat that the water system is protected. In the Hemlingsån, some river pearl mussels have been determined to be around 150 years old.