"Complete rubbish most NZ rivers are influenced by runoff from...

"Complete rubbish most NZ rivers are influenced by runoff from natural compost, bush beds so will always be polluted by natural rotting vegetation"

So streams running through a national park are polluted at the same level as streams running through Auckland? hmmm Pretty sure there is some clear evidence out there around dairy farm discharge polluting streams, or cities dumping raw sewage into streams. Someone in Queenstown might have something to say about water quality.

Bay of Plenty[edit]The Tarawera River, nicknamed "the black drain", has had a history of water pollution, predominantly due to industrial activity. In 2009, the Tasman Mill gained permission to continue polluting the river for the next 25 years.[18]Between 1950 and 1989, the Whakatane Sawmill dumped contaminated sawdust, bark, scrap timber, and chemicals in and around Whakatane and the Rangitaiki Plains, including the Kopeopeo Canal, which has been called New Zealand's most polluted waterway.[19] These wastes came from the timber treatment mill, where PCP had been used as a wood preservative. The PCP was contaminated with dioxin and furan (PCDD/PCDFs), resulting in dioxin-contaminated sediment. Remediation efforts on the canal (sparked initially by Ngāti Awa campaigner Joe Harawira) received international recognition in 2

In Taranaki, there are 1400 dairy sheds where the dairy effluent drains into streams instead of being sprayed to land, according to data from Taranaki Regional Council's 2012 State of the Environment report.[23] In 2012, the president of the New Zealand Freshwater Sciences Society expressed surprise at the number of consented dairy discharges to streams, given most other regional councils prosecute dairy farmers who allow dairy effluent to enter waterways.[24] In 2019, Taranaki Regional Council reported that freshwater quality had deteriorated, with only two of the fifteen sites tested meeting the standards for swimmability.

and on and on