The Bílá Nisa in Loučná nad Nisou
|Water code||CZ : 2-04-07-006|
|Drain over||Lusatian Neisse → Oder → Baltic Sea|
|source||north of Bedřichov on the Klikvová louka in the Jizera Mountains
|muzzle||on the western outskirts of Jablonec nad Nisou in the Lusatian Neisse
|Height difference||300 m|
|Bottom slope||30 ‰|
|Catchment area||22.205 km²|
|Medium-sized cities||Jablonec nad Nisou|
The Bílá Nisa rises north of Bedřichov in the Jizera Mountains in the Klikvová louka ( cranberry heather ) bog in the Jizera Mountains. The village of Bedřichov stretches along its upper course in a south-easterly direction. At Malý Semerink the brook turns to the south, in its valley lie the villages Janov nad Nisou , Velký Semerink, Loučná nad Nisou, Hraničná and Vyšehrad. At its lower reaches the Bílá Nisa forms the border between Mšeno nad Nisou and Rýnovice. After nine kilometers, the White Neisse flows into the Lusatian Neisse on the western outskirts of Jablonec nad Nisou behind the hospital .
- Rábenka, also Rovný potok (l), Velký Semerink
In the Niederdorf of Bedřichov there is a water treatment station on the Bílá Nisa, to which an underground canal from the Josefův Důl dam leads. Another tunnel leads from the Bílá Nisa to the Mšeno dam near Loučná nad Nisou .