| Johannisbach | |
| Mouth Location: | Pau |
| Mouth Coordinates: | 50.776°N 6.0891°W |
| Progression: | Pau→ |
| Subdivision Type1: | Country |
| Subdivision Type2: | States |
Johannisbach is a stream in North Rhine-Westphalia, Germany.[1] It flows through Aachen, merges with the Pau and the Paunell and then discharges into the river Wurm.[1]
The Johannisbach is one of the three historic streams of the medieval city of Aachen. The Johannisbach was used for the disposal of wastewater, while the Pau was diverted to serve as the source of fresh water. The Paunell was what remained in the former course of the diverted Pau.[2]