The Ecan Canterbury water zone maps look quite different to more recent over all maps [red = water quality parameters not met. Yellow = at risk. Light blue = unclassified and can be found at the link below:
or you can go to https://ecan.govt.nz/ the Ecan home page
click on to Canterbury Maps
click the environment icon (a drop outline with a stream emerging from hills)
Scroll down this page until you get to a section RHS “Water Quality and Monitoring”
Click on this and you can check the maps over all of the Canterbury region.
On task bar at top click tables to get meaning of colours.
The fish screen debacle:
You then need to open the 2018/19 summary report to get the revealing story that Ecan’s fish screens don’t work.
https:www.ecan.govt.nz/get-involved/news-and-events/2017/fish-screens-whats-the-story/
Tim Davies ECan’s chief scientist giving one of his “trust us we know what we are doing, we have a plan” presentations.
This linked to a detailed Wisconsin Public Health presentation – https://www.youtube.com/watch?v=mxUMAFushjk