Te Riu o Hokianga is a Maori community development research project involving the Institute of Environmental Science and Research (ESR) Ltd and Hokianga Health Enterprise Trust (HHET) working in partnership with Hokianga hapu and iwi to improve marae-based sewage treatment and disposal systems. Multi-agency hui were held with representatives from district and regional councils, independent engineers, funders and hapu. These hui surfaced the idea of a ‘roadmap’ as a tool to assist hapu navigate through the wastewater management area.

The roadmap sets out a tikanga-based kaupapa Maori process associated with activities for upgrading marae on-site wastewater systems. In supporting hapu wastewater ‘literacy’, the roadmap represents an attempt to bridge the divide between hapu and local government approaches to on-site systems problems/issues. This work revealed the extent of differences between technical and cultural perspectives, including divergent understandings of wastewater discharge and its effects, where the authority to determine land use and the acceptability of discharges lies, and the role/legitimacy of marae in this regard. This paper outlines the strengths and weaknesses of the roadmap in mediating hapu and council worldviews and creating understanding between parties. Broader implications for mana whenua and local authority partnership and excellence in wastewater management are also discussed.