Przemsza

White Przemsza is 63.9 kilometers long, and begins in a bog near Wolbrom. It flows southwest, in a wide valley. Upper White Przemsza has very clean water, which changes at the village of Klucze. Among others, the White Przemsza flows through the Błędów Desert. Black Przemsza is 64.2 kilometers long, and its source is in Bzów, which has been a district of Zawiercie since 1977. In its upper course, the water of the river is very clean, but its quality gets worse at Przeczyce, where a reservoir was built in 1963. Both rivers were named after the color of the water. In the past, Black Przemsza's bed near Będzin contained shallow coal deposits, whilst White Przemsza flowed through limestone hills in the area of Olkusz, so its bottom was white. == Sources ==