More than 200 people gathered at Matahiwi Marae to discuss the water quality of the Tukituki River and other New Zealand waterways.
Last night's public meeting was part of the Green Party's Swimmable Rivers campaign and gave the public a chance to hear the Green's scientific and political views on water quality before being able to share their own.
Among the guest speakers was Professor Russell Death of the Institute of Agriculture and Environment at Massey University.
Professor Death said over the last 20 years the water quality of New Zealand's waterways had dramatically declined due to numerous causes, the most significant being the intensification of dairy farming.
He referred to the dairy industry as the "root of the problem" and said the issues at hand had been transformed form a scientific one to a cultural, social and political one.