The Supraśl is a

river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...

in east

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

Podlaskie Voivodeship Podlaskie Voivodeship ( ) is a Voivodeships of Poland, voivodeship in northeastern Poland. The name of the voivodeship refers to the historical region of Podlachia (in Polish, ''Podlasie''), and significant part of its territory corresponds to th ...

, a tributary of the

Narew The Narew (; ; or ) is a 499-kilometre (310 mi) river primarily in north-eastern Poland. It is a tributary of the river Vistula. The Narew is one of Europe's few braided rivers, the term relating to the twisted channels resembling braided h ...

river (near Złotoria), with a length of 93,8 kilometres and the basin area of 1,844.4 km². Supraśl is the source of the

drinking water Drinking water or potable water is water that is safe for ingestion, either when drunk directly in liquid form or consumed indirectly through food preparation. It is often (but not always) supplied through taps, in which case it is also calle ...

for

Białystok Białystok is the largest city in northeastern Poland and the capital of the Podlaskie Voivodeship. It is the List of cities and towns in Poland, tenth-largest city in Poland, second in terms of population density, and thirteenth in area. Biał ...

Tributaries

Słoja (r), Sokołda (r), Kamionka (l), Płoska (l), Pilnica (l), Czarna (r), Biała (l)

Cities and towns

Michałowo Michałowo () is a town in Białystok County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It is the seat of the gmina (administrative district) called Gmina Michałowo. It lies approximately east of the re ...

* Gródek *

Supraśl Supraśl (; ; ) is a town and former episcopal see in Białystok County, in Podlaskie Voivodeship, in north-eastern Poland. It is the seat of the Gmina Supraśl. It is situated on the Supraśl (river), Supraśl River, about northeast of Białyst ...

Wasilków Wasilków is a town in north-eastern Poland, in Białystok County, in Podlaskie Voivodeship, about north of Białystok, with 12 559 inhabitants (2022). It is a northern suburb of Białystok, situated on the Supraśl River. History The first ...

Rivers of Poland Rivers of Podlaskie Voivodeship {{Podlasie-geo-stub