The Gisborne District Council has 31 stream and river monitoring sites where a range of water quality indicators are tested. All of the surface water sites across the region are sampled monthly.
In the rural environment water quality is dominated by production of sediment from the soft rocks (which is accelerated where there is little forest cover), and livestock access to waterways. Unstable hill country makes riparian fencing very difficult.
The district is renowned for soil erosion susceptibility due to historical clearing of indigenous forest from the soft rock hills for pastoral farming.
The main rivers entering Poverty Bay are the Waipaoa River, draining a catchment of approximately 216,000 ha and the Waimata River with a catchment of 37,000 ha.
Further north, the Waiapu catchment of 173,00 ha is the largest and includes the Mata, Waitahia and Tapuaeroa rivers.
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.
LAWA Partners shall not be liable, whether in contract, tort, equity or otherwise, for any loss or damage of any type (including consequential losses) arising directly or indirectly from the inadequacy, inaccuracy or any other deficiency in information supplied irrespective of the cause. Use of information supplied is entirely at the risk of the recipient and shall be deemed to be acceptance of this liability exclusion.