Neffelsee (also Naturschutzsee Füssenich) is a lake in Zülpich, North Rhine-Westphalia, Germany. With a depth of 28 m, its surface area is 65 ha.
| Neffelsee | |
|---|---|
 | |
  Neffelsee | |
| Location | Zülpich, North Rhine-Westphalia |
| Coordinates | 50°41′50″N 06°37′31″E / 50.69722°N 6.62528°E |
| Primary inflows | Neffelbach |
| Primary outflows | Neffelbach |
| Basin countries | Germany |
| Surface area | 65 ha (160 acres) |
| Max. depth | 28 m (92 ft) |
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