|- location||Kempton Park|
|1,212 m (3,976 ft)|
|Length||94 km (58 mi)|
|River system||Crocodile River (Limpopo)|
|- right||Rietvlei River|
The Hennops River is one of the larger rivers that drains Gauteng, South Africa. It has its source near Kempton Park, eastern Johannesburg and meets the Crocodile River (Limpopo) shortly before Hartbeespoort Dam. It is one of Gauteng's most polluted rivers.
The Hennops River starts in Terenure, Kempton Park, and flows in a northerly direction towards Tembisa township. It then flows past Olifantsfontein and meets the Sesmyl Spruit which flows out of the Rietvlei Dam. The river then turns north-west flowing through the centre of Centurion. The river continues in this direction flowing through the foothills of the Magaliesberg before flowing into the Crocodile River (Limpopo) on its right bank.
The Hennops River is one of Gauteng's heavily polluted rivers. Insufficient and poorly-maintained sanitation facilities in Tembisa, Ivory Park, Olifantsfontein and Erasmia have turned the river into an open sewer. AfriForum gathered water samples from the Hennops River and according to the results‚ more than 1 000 000 units of the indicator microbe Escherichia coli were present per 100 ml of water. The health risk is high for people coming into full or partial contact with water having more than 2000 colony forming units per 100 ml . Untreated or partially treated sewage also contains high concentrations of phosphate and nitrate, which contribute to the eutrophication problems in Hartbeespoort Dam.
The valley of the river is a weekend and holiday destination for residents of the nearby cities. The banks of the Hennops are a popular location for hiking, fishing, camping, and picnicking. It is crossed by two small suspension bridges, one at Centurion Mall, and the other at Hennops Pride . There are also resorts and a 4x4 trail.
- Crocodile/Marico WMA 3
- Du Preez, Martella; Kühn, Anneli; Van Niekerk, Harold; Venter, S N. "National Microbial Monitoring Programme for Surface Water. Implementation manual" (PDF). Department of Water Affairs and Forestry. Department of Water Affairs and Forestry. Retrieved 28 July 2018.
- Hennops Hiking Trail
- Hennops Pride Caravan Park
- Hennops 4x4 trail
- Natural and anthropogenic influences on water quality: an example from rivers draining the Johannesburg Granite Dome
- Tourist Attractions near Hennops River, Gauteng, South Africa
- Hennops Off-road Trail - Drive Out
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