Montana Train Derailment and Bridge Collapse into Yellowstone River: Cleanup and Safety Measures Underway.

Preliminary testing of water and air quality along a stretch of the Yellowstone River where train cars carrying hazardous materials fell into the waterway following a bridge collapse did not indicate any threat to the public, state and federal officials said Sunday. The water testing is being done by contractors working for the train’s operator, Montana Rail Link, while the Montana Department of Environmental Quality and the federal Environmental Protection Agency are overseeing it. Contractors monitoring the air downwind of the derailment for the EPA have not detected any toxic gases.