Measure of the temporal and spatial variability in the water quality of New Zealand freshwaters (rivers) (state and trends). The NRWQN dataset is offered as a nationally available resource for the New Zealand public, institutions and companies who need access to a well-maintained long-term data repository. For scientific-based advice, collaborative proposals, or possible shared data storing, please contact the Responsible party below. For simple access to various existing Databases (e.g. site information and raw data) refer to other relevant NRWQN Catalogue entries