Pressures on water quality in Southland are from agricultural development and intensification, as well as from urban development including industrial and wastewater discharges.
Environment Southland monitors 76 water quality sites around the region to assess the state and trends of water quality and risk to community from swimming. Most sites are located in hill country and lowland catchments, with fewer sites occurring in natural state areas.
Water quality is generally excellent in natural state areas such as Fiordland and Stewart Island. However, many lowland rivers and streams show elevated levels of nutrients. Many lowland streams' bacterial loadings are above the national and Regional Water Plan standards. Water clarity is acceptable in most monitored catchments, with the exception of streams with naturally diminished clarity, such as those draining peat swamps or tannin-stained catchments. These streams often have naturally lower dissolved oxygen and pH levels.
This dashboard shows information on the data collected by the regional councils for water quality indicators, analysed as
The state for the region is represented by theconcentration for the across all sites within the region and then compares that value to the for all monitored sites in New Zealand.
Click on the parameters state icons to compare this region with others nationally.
State shows how theof samples from this site compares to other sites
Trend shows how the quality of water is changing over time. Depending on the sampling history duration, five and ten year timescales are available:
The Cawthron Institute has worked alongside regional councils to verify the processes and methods used for data collection, laboratory analysis of samples collected and the statistical analysis and interpretation of the results presented.
If all Cawthron ticks are green, then you can trust this data. However, if one or more ticks are orange, then conclusions should be treated with some caution.
For more details on each tick, see our 'Can I Trust This Data?' Factsheet.
All samples were collected using approved field protocols and have been analysed in accredited laboratories. Therefore the data shown here has been collected and analysed following best practice.
All samples were collected using approved field protocols and have been analysed in accredited laboratories.
This data is not flow adjusted. National guidelines suggest that flow-sensitive variables are flow 'adjusted' before trend analysis. Therefore, any trends shown here may be affected by variations in flow across sampling occasions.
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