Vedaån flows from the lake Likstammen to the lake Svarvaren in the Svärtaå drainage area. The upper parts of Vedaån are included in the “Likstammen-Tröns area” of national interest for nature conservation. Vedaån meanders through a small-scale agricultural landscape with elements of forested areas. Today, the river is unregulated, but there has been a millpond about three km upstream the outlet in lake Svarvaren. In the upper part of the river, the dominating bottom substrate is gravel, sand and clay, while bottom substrate in lower parts is dominated by clay.
Vedaån is one of few water systems in Södermanland where the Thick shelled river mussel (Unio crassus) has been found. We can also find two rare mayfly species Caenis rivulorum (only finding in Sweden on soft bottom substrate of this species) and beatis digitus. In the summer of 2006, Alburnus alburnus, Perca fluviatilis, Abramis brama, Rutilus rutilus, Lota lota, Esox lucius and Lampetra planeri were caught during electro fishing sampling in the river. In addition, there is also Gymnocephalus cernuus (ruffe), Anguilla anguilla, Leuciscus idus (ide), Tinca tinca and Scardinius erythrophthalmus in the upstream lake Likstammen.
The UC4LIFE related conservation actions include habitat improvements (by adding substrate and woody debris, tree plantations etc) at three specific sites within the river.