On July 31, members of the Grassy Narrows First Nation will head to the Ontario Legislative Building in Toronto and are calling on supporters to join them “in a walk for clean water and indigenous rights.” Two days before, on July 29, there will be a speaking event with Grassy Narrows Clan Mother Judy Da Silva, Grassy Narrows Chief Roger Fobister, writer and activist Leanne Simpson, and Stephen Lewis. Here’s why: It is shocking that neither Canada nor the province of Ontario have recognized even one case of mercury poisoning in the 50 years since the province allowed 10 tonnes of mercury to be dumped into the Wabigoon River, which provides numerous communities with water and fish. It is even more shocking that this river has never been cleaned up and continues to provide these communities with water and fish. In the U.S., the Environmental Protection Agency advise that any spill larger than 2 tablespoons of mercury should be reported to the state environmental agency, and it is mandatory to call the National Response Center. But just north of the border, tonnes of mercury can be put into river systems with little concern about cleanup, remediation and human health – apparently. Citizens of Grassy Narrows, however, can’t afford to ignore mercury contamination. Grassy Narrows, or Asubpeechoseewagong in Anishnaabe, is located in Treaty 3 territory in northern Ontario. It is one of the communities still facing the impacts of the Dryden pulp and paper mill’s reckless disposal of mercury more than a half century after the spill.