A do-not-consume advisory for drinking water in Sachs Harbour, N.W.T., has been lifted in a handful of locations in the community of about 100. Meanwhile, tap water remains unsafe to drink for many, and there's still no explanation of what happened. The do-not-consume order first went into effect four weeks ago, on March 23, after the territory's chief public health officer reported a fuel smell and an oily sheen in water deliveries.