Because they like that not one river in NZ is fit to drink from?
But behind New Zealand’s clean and green image is a dirty truth — its freshwater rivers are among the most polluted in the developed world.
Last year, a government report found nearly 60 per cent of the country’s rivers carry pollution above acceptable levels, with 95 to 99 per cent of rivers in pastoral, urban and non-native forested areas contaminated.
https://www.abc.net.au/news/2021-03-16/new-zealand-rivers-pollution-100-per-cent-pure/13236174