Not sure about the ability to link them. I know I’m the UK my professor was working on a zone with higher cancer linked to certain industrial areas. Government basically stepped in to say stop.

Think she eventually leaked it and there was hell to pay. Whole areas became red zones and nobody could sell their house.

Probably not as extreme here but would definitely put a damper on house prices.

I was under the impression everywhere is unsafe for swimming. Everytime it rains most of Auckland goes to red