The Erft (pronounced [ʔɛɐ̯ft]) is a river in North Rhine-Westphalia, Germany. It flows through the foothills of the Eifel, and joins the Lower Rhine (left tributary). Its origin is near Nettersheim, and its mouth in Neuss-Grimlinghausen south of the Josef Cardinal Frings Bridge. The river is 106.6 kilometres (66.2 mi) long, which is significantly shorter than it was originally. Due to the open-pit mining of lignite in the Hambacher Loch, the flow of the river had to be changed.

Erft in Bergheim.jpg
Lower reaches of the Erft near Bergheim
Erft (rivière).png
Cours of the river Erft [1]
StateNorth Rhine-Westphalia
Reference no.DE: 274
Physical characteristics
 • locationSoutheast of Engelgau as the Kuhbach
Signed source of the Erft near Holzmülheim
 • coordinates50°29′14″N 6°35′14″E / 50.48722°N 6.58722°E / 50.48722; 6.58722Coordinates: 50°29′14″N 6°35′14″E / 50.48722°N 6.58722°E / 50.48722; 6.58722
 • elevation527 m above sea level (NHN)
 • location
Rhine near Neuss-Grimlinghausen
 • coordinates
51°11′04″N 6°43′54″E / 51.18444°N 6.73167°E / 51.18444; 6.73167
 • elevation
31 m above sea level (NHN)
Length106.6 km (66.2 mi) (incl. Kuhbach)[1]
Basin size1,837.915 km2 (709.623 sq mi) [1]
 • locationat Neubrück gauge[2]
 • average16.4 m3/s (580 cu ft/s)
 • minimumRecord low: 5.15 m3/s (182 cu ft/s) (in 16.07.2007)
Average low: 10.4 m3/s (370 cu ft/s)
 • maximumAverage high: 31.3 m3/s (1,110 cu ft/s)
Record high: 46.6 m3/s (1,650 cu ft/s) (in 04.06.1984)
Basin features
ProgressionRhineNorth Sea
 • leftVeybach, Rotbach, Neffelbach
 • rightSwist, Gillbach, Norfbach

The Erft gave its name to the town of Erftstadt, through which it flows, as well as to the Rhein-Erft district. It also flows through the towns of Bad Münstereifel, Euskirchen, Bergheim, Bedburg and Grevenbroich.