In September 2015, the Water Environment Federation published the results from the Washington State Department of Ecology’s Puget Sound roof runoff study in Water Environment Research. The study tested 14 types of roofing materials for runoff water contaminants following rain events. The results from the runoff study can be found in the article here: http://www.ingentaconnect.com/content/wef/wer/2015/00000087/00000009/art00009
