The Płonia is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in West Pomeranian Voivodeship

West Pomeranian Voivodeship

West Pomeranian Voivodeship, , is a voivodeship in northwestern Poland. It borders on Pomeranian Voivodeship to the east, Greater Poland Voivodeship to the southeast, Lubusz Voivodeship to the south, the German federal-state of Mecklenburg-West Pomerania to the west, and the Baltic Sea to the north...

, Poland

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

, a right tributary of the Oder

Oder

The Oder is a river in Central Europe. It rises in the Czech Republic and flows through western Poland, later forming of the border between Poland and Germany, part of the Oder-Neisse line...

 river, with a length of 74.3 km and a basin area of 1101 km². Its source is 1.5 south of Barlinek

Barlinek

Barlinek is a town in Poland, in West Pomeranian Voivodeship, in Myślibórz County. It has 14,162 inhabitants .The first written mention about the town is from 1278 . In the first half of the 15th century, the town, situated in the Neumark region, was under control of the Teutonic Knights...

. The river flows northwest through Miedwie

Miedwie

Miedwie is a lake in Pomeranian Lakeland, West Pomeranian Voivodship, Poland. It is 35 km² large, 16.2 km long and 3.2 km wide. Its maximum depth is 43.8 m....

 and Płoń lake. The Płonia flows into Dąbie Lake

Dabie Lake

Dąbie is a lake in the delta of the Oder in northwestern Poland in Szczecin. South of the lake lies a Szczecin district also called Dąbie....

 in Dąbie, Szczecin.

The upper portion of Płonia is comparatively unpolluted, therefore trout

Trout

Trout is the name for a number of species of freshwater and saltwater fish belonging to the Salmoninae subfamily of the family Salmonidae. Salmon belong to the same family as trout. Most salmon species spend almost all their lives in salt water...

can be found there.