For 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.
ISO 9001 Current Revision Certified for Quality Management System Compliance
NSF/ANSI Standard 60 for Drinking Water Chemicals
ASTM C737-08 Conformance for Limestone Dusting of Coal Mines
Compliance program
30 CFR §75.2 Federal Regulatory Requirements for Rock Dust
Compliance program
NSFANSI60
Quality certification
M & M Lime Co., IncEstablished in 1958, M & M Lime Co., Inc. deep-mines and supplies Pennsylvania-approved limestone and gravel aggregates to Western Pennsylvania’s construction, municipal, agricultural, and residential customers. Its Buffalo & Pittsburgh rail siding sets the Worthington operation apart, enabling large-volume aggregate shipments and transloading between railcars and trucks. PennDOT and independent laboratory testing, along with on-site testing and certified scales, support the consistent materials and accurate deliveries the company is known for.212312WORTHINGTON, PA
Mintek Resources, IncFounded in 1994, Beavercreek-based Mintek Resources supplies lime-based chemical reagents that dry, modify and stabilize soil, sediments and waste streams for projects across the United States. Mintek is the exclusive supplier of Calciment® LKD, a lime-manufacturing coproduct it developed into a practical alternative to quicklime or Portland cement, and it supports customers with geotechnical testing and nationwide delivery. The company operates as a subsidiary of Carmeuse and ships hundreds of thousands of tons annually.BEAVERCREEK, OH
GraymontFamily-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™.327410BELLEFONTE, PA
Carmeuse SystemsCarmeuse Systems emerged in 2024 from the unification of several legacy businesses under Carmeuse, the privately owned lime and limestone producer founded in 1860. Today, it brings that material knowledge to industrial operations as a trusted advisor, designing and supporting systems that handle lime and other dry bulk materials throughout their working life. Its ISO 9001 certification reflects the quality controls behind that practical, end-to-end support.PITTSBURGH, PA