I can tell you what I know from my experience in this situation.
We first became aware of this situation, I believe, through the ATC, the Athabasca Tribal Council, in February. I immediately reached out to the AER to find out what was going on. Our municipality at that time closed off the raw water that is taken out of Lake Athabasca for our treatment centres. We closed the supply at that time to look into the situation.
At that time, I also had very close conversations with Chief Adam, Chief Tuccaro and President Cardinal. We were all on the board, and the AER was communicating with us that way. The AER actually drove from Edmonton to Fort Chipewyan on the winter road to meet with first nations the very next day.