Rivers that are polluted

The Black Drain

Tarawera River Is located in the bay of plenty. The bay of plenty is not in Auckland it is in Whakatane. People call Tarawera river black drain because below the Ogi and Norske Skog pulp and paper mills at Kawerau the river becomes brown, sluggish and sad. 

The Manawatu River
The Manawatu River is highly polluted. This is largely due to runoff from surrounding dairy farms, but towns on the river's edge also contribute to this pollution with untreated sewage and industrial waste.