EL DORADO -- Residents in El Dorado came outside Tuesday afternoon and noticed Champagnolle Creek had turned green.
El Dorado and Union County officials having been working to find out what caused the water to change color.
Crews have built a dam, and are pumping the water into tanks.
A green, foamy liquid has contaminated the creek and killed the fish in it.
General Manager of El Dorado Water Utilities, Mark Smith, tells us he has an idea of how this toxin has gotten into the creek.
"We believe these are chemicals that were dumped from a car wash that was being torn down on Main Street, and put down their floor drain, which took that product to the storm drain," says Smith.
Residents have been advised to stay away from the contaminated area until further notice.