Not mentioned: micro plastics are also trapped in arctic sea ice<p><a href="http://news.sciencemag.org/earth/2014/05/trillions-plastic-pieces-may-be-trapped-arctic-ice" rel="nofollow">http://news.sciencemag.org/earth/2014/05/trillions-plastic-p...</a><p>Also, lots of nasty stuff in DWR (common in technical clothing) winds up in the environment like PFOA / PFOS. Patagonia, Columbia, and Mountain Hardwear (among others possibly) recognize the problem but haven't found anything as a suitable replacement yet.
Another area of concern with plastics and water is with microbeads and pre-production plastics. <a href="http://www.theguardian.com/vital-signs/2015/mar/27/microbead-california-pollution-nurdle-law-plastic" rel="nofollow">http://www.theguardian.com/vital-signs/2015/mar/27/microbead...</a><p>As part of health care products or just raw (pre-production) they get introduced into our wastewater and stormwater systems.