Chief Sherry Ackabee of Grassy Narrows First Nation and Clayton Cameron, a spokesperson for Wabaseemoong Independent Nations, spoke to media during an NDP news conference to call on the government to take action on mercury contamination in their northwestern Ontario communities. They say the Dryden paper mill, which dumped about nine tonnes of mercury into the English-Wabigoon River System in the 1960s and '70s, continues to pollute the water system.