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New study aims to define what plastics are getting into our rivers and how to stop them..
Tarawera River clean-up is 'major success' but its waters still not pristine, says expert.
Key to improving water quality is increasing NZ's wetlands...
$21m project is genetically selecting cows to reduce nitrogen leaching in NZ.
A ground-breaking flood control system could also help improve NZ's rivers and streams.
Whitebait numbers have been dropping but water quality and other measures are helping.
We've compiled 10 simple ways to help clean up our waterways...
After 26 pollution problems were found, Takapuna beach is undergoing a major clean-up.
But dairy farmers not compliant on effluent matters can be easily fixed.