Community Waste Management, 1315 Ray Rd, Hyattsville, MD 20782, US

The Gypsum Association is a not-for-profit trade association located in Hyattsville. Its mission is, "to promote the use of gypsum while advancing the development growth and general welfare of the gypsum industry in the United States and Canada on behalf of its member companies." Gypsum is a mineral found in sedimentary rock formations in a crystalline form known as calcium sulfate dehydrate. For more information on this association, check out the association's website or give a representative a call.