This chapter examines the historical waterscapes of Indigenous Māori iwi (tribes) and hapū (sub-tribes) in the Waipā River (Aotearoa New Zealand). We highlight some of the principles of Te Ao Māori (the Māori world) that shaped Māori understandings and engagements with their ancestral waters and lands prior to colonisation. We explore how the arrival of Europeans resulted in Māori embracing new technologies, ideas, and biota, but always situating and adapting these new imports to fit within their Indigenous ontologies and epistemologies. In contrast, British colonial officials were unwilling to embrace such cross-cultural learnings nor allow Te Ao Māori to peacefully co-existent with their own world (Te Ao Pākehā). Military invasion, war, and the confiscation of Māori land occurred, which laid the foundations for environmental injustices.