The whanau had stopped them from swimming in the main river and directed them to a tributary, the Tirohanga Stream.
"I am pleased to report that Ngati Manu has been able to recruit on to Te Kahui Kaitiaki o Ngati Manu some of the brightest young hearts and minds in the hapu," he added.
"They are keen to get started and achieve positive outcomes, focus on practical on-the-ground action and clean up our river."
The elected members were Mr Hamilton, Dr Krushil Watene, graduating marine biologist Peter Van Kampen, scientist Ebony Wikaira-Prime, youth worker Te Kauri Macpherson, and "passionate Ngati Manu taiohi" Shane Tane.
"We need to start now, otherwise the next generation will be left with nothing but a cesspool of pollution in the future, and that is not the legacy we want to leave for our mokopuna," he said.
"Cleaning up the Taumarere River is of utmost importance to us, as we want to restore life and vitality back into our awa to sustain our future generations, not just environmentally but culturally and spiritually as well."