[2] Flowing from Viksjö in Järfälla, the stream starts as a ditch receiving considerable amounts of stormwater from the residential area Jakobsberg.

After a bit more than 2 km, near Barkarby Airport, it dives into a short culvert before merging with another ditch (Veddsta dike) bringing water from a golf range, industrial and residential areas.

It then passes under the traffic route E18 to continue 1 km through am open grassland in it natural meandering shape past some allotment-gardens near Tensta before reaching the ponds in the park of Hjulsta.

[3] As most of the inflow comes from settled grounds, including industrial areas and streets, the stream contains high levels of nutrients, metals and bacteria, with sediments contaminated with oil.

Increased levels of metals, particularly copper, has been reported, and minor oil discharges are rather common with negative impact on local bird life.