Nurdles are pre-production microplastic pellets about the size of peas. Plastics companies melt them down to make stuff and sometimes they flush them away. Because they are Hydrophobic nasty chemicals like PCBs and DDE latch on to them, which would be cool but unforuntately they look like food and animals eat them and die. (details). I am collecting these ones in Pakuranga Creek to send to Japan for Analysis via www.pelletwatch.org
These Nurdles are likely from a local plastic manufacturing company. I will take some photos and let them know.
Update: I checked the storm water pipes that the plastics company uses and I found no Nurdles at all! They must be coming from somewhere else. Other storm water pipes in the area seem clean, there is something suspicious about the original outlet, there are too many different kinds of pallet for them to come from one spill.
I am used to seeing icky contaminated run off like this. From here. UPDATE: I think this is bubbling up from landfill (we have over 200 different sites around Auckland City). I have asked Auckland Council about it.
But this is just weird, it dries hard. Like the mud is covered in milky ice. I found it here.
I didn’t really get how zinc from galvanised roofs could be poisoning the estuary until I made this map. I found a presentation by Marcus Cameron which suggests that sites the source (the head of the estuary) are trending up (more zinc). At the same stormwater conference Judy Anne Ansen showed a pie chart on Industrial (Mt Wellington) zinc sources with about 80% attributed to roofs.
Marine report card for Tamaki is here: