The United States Cement and Supplementary Cementitious Materials Supply Map provides a geographic overview of cement production facilities and distribution terminals across the country. The map also identifies locations where supplementary cementitious materials—such as slag cement, fly ash, and natural pozzolans—are available. By visualizing this supply network, the tool helps designers, engineers, and contractors better understand regional material availability when evaluating concrete mix design strategies, including blended and lower-carbon cement systems.