river water pollution in nz

what is causing river pollution?

Water pollution comes from two main sources

  • Point sources: single outlets, such as a sewage pipe or a drain outlet, leading in to our rivers.
  • Non-point sources: more diffuse seepage, for instance from underground sources or from small streams flowing into rivers.

what is river pollution?

River pollution is the pollution of a river. This form of environmental degradation occurs when contaminants are directly or indirectly discharged into a river without passable treatment to remove harmful compounds.