[2] In 2003, the Busan municipal government began redevelopment in order to address the stream's environmental issues and provide recreation facilities on its banks.

[1] The Oncheon Stream Park along the banks of the river is an excellent place to view the blossoming of cherry trees.

A 1984 study found that the water contained more than ten times the safe level of synthetic organic compounds, attributable to the dumping of industrial waste in the river.

[3] In April 2000, eight social & environmental volunteer groups began efforts to restore the river's ecosystem.

[citation needed] However, by 2008, there was still far greater plant diversity at the upper reaches of the river than in the urban area.