Okay, so I saw this and I had to show you all. It is called a rain garden and can remove up to 99% of toxins that run off of roofs. Just position near a downspout, dig a hole, plant some plants, and you’re done.
Rain20Gardens20of20West20Michigan20-20Home
UPDATE: Not sure how this one was marked private. But I just un-marked it. Interested to see what happens when I do that.
blief 