The Engen refinery is a crude oil refinery in Wentworth, KwaZulu-Natal,
Durban, South Africa operated by Engen Petroleum. It produced 120,000 barrels per day and while operational, was the second largest crude oil refinery in Durban, supplying about 17% of the nation's fuel. The refinery is located in the centre of a residential area. The area around the refineries is colloquially known as "cancer valley" due to the provenience of cancers in the population.
Leukaemia rates are 24 times greater than the national average. A 2002 study of the Settlers Primary School next to the refinery found hat 52% of the pupils suffered from asthma. == History ==