A chlorine explosion has shaken a water treatment plant near Berthoud, but officials say there were no injuries.
The blast occurred as chemicals were being unloaded from a truck Friday morning.
Berthoud Fire District spokeswoman Debra Graves says four people were being decontaminated.
Graves said some chlorine was released, but she did not know how much. She said no cloud was visible at the site near Carter Lake, about 40 miles north of Denver.
The Little Thompson Water District and the Central Weld County Water District own and operate the plant.
Little Thompson business manager Judy Dahl says no one was hurt, and there will be no effect on the quality of water as production will continue from other filter plants.
The Larimer County sheriff, Loveland hazardous materials team, Thompson Valley Ambulance and Berthoud Fire District have all responded to the scene.
No evacuations are being reported.