The Grupo Cementos de Chihuahua (GCC) Pueblo cement plant is Colorado's only Energy Star certified manufacturing plant having been given the award by the US Environmental Protection Agency (EPA) in recognition of its superior energy performance.

"Energy Star certified plants perform in the top 25 per cent of similar facilities nationwide," Enrique Escalante, chief executives of GCC, said in a statement. "We're proud to say that our Pueblo plant scored a perfect 100, proving it is tops in energy efficiency in manufacturing."

Nationally, 100 manufacturers received the certification for 2018.