COSTELLO: We're waiting to hear from the Colorado governor who's expected to hold a briefing on the millions of gallons of toxic sludge that was accidentally dumped into the Animas River. So far, officials have provided few details about the potential environmental disaster. They haven't warned of health risks facing locals or whether or not the drinking water is in peril. But answers need to come soon, because those pollutants that have turned this river orange are spreading and cities in New Mexico are now at risk. CNN's Dan Simon live in Durango with more for you this morning. Good morning, Dan.</s>DAN SIMON, CNN CORRESPONDENT: Good morning, Carol. Well, the EPA is usually in the business of responding to emergencies, not causing them. But that is exactly what happened in this case. You can see signs like this along the river saying it's closed. And, Carol, let me show why exactly that is. You can see along the shore here this toxic sludge. Some people have described it as looking sort of like a mustardish color. I would agree with that. In other parts, you can't really see it, but that doesn't mean that the danger has passed. It simply means that this material is very heavy and it has sunk to the bottom. Let me show you some of the water we have collected. You can see it right here. And this is just some nasty looking stuff. This all happened when the EPA was trying to clean up that abandoned gold mine. And it completely backfired. You have three million gallons of this toxic water spilled into the river, the river is closed.
Rpt: 3 Million Gallons of Toxic Sludge Spread.