According to the U.S. Geological Survey, production of Portland cement in USA in the year 2018 was 85.4 million tons. The top 10 Portland cement manufactures in USA are LafargeHolcim, CEMEX, Lehigh Hanson, Buzzi Unicem, Ash Grove Cement, Martin Marietta Materials, Eagle Materials, Essroc Cement, Argos, and St. Marys Cement.
The Multinationals LafargeHolcim, CEMEX and Lehigh Hanson hold more than 40% (19+14.7+9.2) share of the cement industry in the USA. The rest is shared by small multinationals and some domestic players.
LafargeHolcim has 13 cement plants in the USA and produce around 22 million tons of cement annually. It has its headquarters in Chicago. Going by the production capacity LafargeHolcim is the largest cement production company in the United States.
Lehigh Hanson has an interesting history. Lehigh started as a cement production company in US in 1897. It was later acquired by the German company Heidelberg which is one of the largest cement producers in the world.
Cement industry has always been riddled with concerns related to environmental safety. The manufacturing process of cement is a source of various pollutants like carbon dioxide and carbon monoxide. Hence, it is expected that the manufacturers of cement follow certain environment safety standards like installation of latest pollution controls in its factories.
Firstly, economic slowdown due to the recession of 2008 has led to an overall low consumption of cement. This means cement companies in America are producing cement at less than full capacity or not producing at all.