Family-owned since its 1948 founding, Graymont grew from a single lime and limestone operation near Sherbrooke, Quebec into a company serving customers across North America and Asia Pacific. Its 1,600-member workforce supports essential industrial and agricultural processes with calcium-based solutions, while the company develops lower-carbon alternatives such as GRAYBOND™.
ASTM C206
ASTM C207
Greer Lime CompanyFor more than 50 years, Greer Lime Company has been part of Pendleton County, West Virginia, building its business from a start supplying rock dust to the region’s coal mines. Today, the company draws on its own high-calcium limestone reserves to make lime for customers across the eastern United States, with daily laboratory testing supporting consistent chemistry. Greer Lime operates under ISO 9001 certification and holds NSF/ANSI Standard 60 certification for drinking-water chemicals.RIVERTON, WV
OmyaFounded in 1884, Omya develops and produces natural mineral solutions, with calcium carbonate from marble, limestone and chalk at the heart of its work. The company combines deep mineral chemistry expertise with global distribution of specialty materials, supporting customers through scientists in more than 50 countries and 17 dedicated laboratories. Omya’s products are used in everyday goods and materials ranging from toothpaste and food to packaging and construction products.MASON, OH
Calcium Chloride SalesFounded in September 1964, family-owned and operated Calcium Chloride Sales supplies calcium chloride products, winter deicers and dust-control solutions to municipal and industrial customers. Based in Pennsylvania, the company serves customers across the Midwest and Northeast, with more than 50 years of experience controlling dust on unpaved gravel surfaces and products manufactured in the USA.GROVE CITY, PA
Gray & Son, IncFamily-owned and operated since 1908, Gray & Son is a Maryland site-development and paving contractor that also produces asphalt from regional plants. The company’s roots run from the Gray family’s Butler Mill and stone quarry to a multigenerational Baltimore-area construction business, with third-generation executive vice president Katie McInnes helping carry that history forward. Its work includes major public, commercial, and residential projects, including the Under Armour Product & Innovation Center in Port Covington.LUTHERVILLE TIMONIUM, MD