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Waiongana Stream

This catchment is representative of a northern Taranaki ring plain lowland stream, which has headwaters outside the National Park. The Mangaoraka Stream drains mostly intensive agricultural land, with 91% of the catchment above the site in agriculture. The stream holds special value for Te Atiawa Iwi. It is a trout fishery of local importance and has very good access from the sea for native fish.  The stream is also the principal tributary of the lower Waiongana Stream.


Trend analysis of more recent data, collected over a seven-year period, shows all water quality parameters have stabilised and ecological health is significantly improving in this catchment. Water quality is expected to continue to improve in coming years as new riparian planting in the catchment establishes. 

The Mangaoraka catchment has a total of 335 km of stream bank.  The Council’s database shows 51% of the stream banks in the catchment are planted in riparian vegetation with 1% stream banks located within Egmont National Park and 50% of stream banks covered by a Council riparian management plan outside the park boundary.  Further to this, 74% of stream banks are fenced outside the park.  Overall, 91% of the stream banks outside of Egmont National Park are covered by riparian plans (June 2019).

Sites 3

Monitored sites in the Waiongana Stream catchment

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