I am sure there is more to this story having lived in the general area for 50 years.  First of all -  are there any mercury affected people, i mean in their body?.  I remember when this first hit the news back in the 60s  or early 70s. Back then - it was estimated you had to eat about a bathtub full of fish per month to be affected. the protests were acknowledged and payments were made.  There is mercury but it does not jump out of the water and attach itself to human tissue. If you don't eat the fish (and you have to eat a lot) you are not affected. Has there been mercury found in  the drinking water. Everything i read does not mention that.  As well, is there a single contaminated victim who can be examined as direct evidence ?  As well, there is mercury in many lake/river systems as a naturally occurring threat.  Having been to Grassy Narrows I would think they need a lot of other improvements more than this.