A study on the benefits of street sweeping for reducing stormwater contaminant loads to streams has been completed for Nelson City Council (NCC). The study found that properly designed street-sweeping programmes can reduce contaminant loads in catchments by approximately 30 per cent.
A recent study by NIWA has identified levels of some emerging contaminants around the Auckland marine environment that are similar to those measured in other industrialised countries.
What are emerging contaminants?
On-site disposal of poorly treated household wastewater can be a significant source of pollution in ground and surface water.
What we predicted for July 2011 to September 2011
River flows are likely to be normal in the North Island and north of the South Island, and normal or below normal in the rest of the South Island.
What actually happened during July 2011 to September 2011
River flows were normal to below normal for most of the country, with some above normal river flows in the eastern North Island, eastern Southland and coastal Otago.
NIWA is sponsoring the Health Related Water Microbiology workshop.
The workshop will be held in Rotorua and will cover topics including:
Water pollution and diseases, microbial source tracking, catchment protection, biofilm studies, water and sanitation in developing country, climate change and water quality, recreational water and health, epidemiology of waterborne diseases, microbial risk assessment, microbial quality of shellfish growing areas, applications of nanotechnology, water and energy and, zoonoses.
NIWA sponsored the 15th International Conference of the IWA Diffuse Pollution Specialist Group on: Diffuse Pollution and Eutrophication.
Seasonal data from the National River Water Quality Monitoring Network.
We are regularly adding new material to our website. Here are a few examples.
Abstracting water from rivers is likely to cause changes in river flows, endangering habitats and making supply unreliable for downstream users. NIWA is working to develop river flow rules that can be applied at a local level to prevent these problems.