The Government's Action for Healthy Waterways package will go some way toward improving water quality but also "significantly" affect the business of some farmers and cost Horizons region ratepayers.
The package, announced on August 5, comes into effect in stages, starting on September 3.
It sets new rules for fish passage and stock exclusion, caps nitrogen fertiliser use and stops some intensive winter grazing practices.
The package puts the health and wellbeing of water as a first priority, with the essential needs of people second. Protecting threatened species and providing places for kai gathering join ecosystem health and human recreational health as values.
Regional councils will have a key role in making the package work, Horizons chairwoman Rachel Keedwell said. Horizons will now look at how to implement it and whether it will affect proposed changes to its One Plan.