United States Army Chemical Materials Activity
A U.S. Army organization responsible for the secure stewardship of remaining chemical-weapons materials, chemical stockpile sites, and related emergency-preparedness programs.
Last updated August 26, 2026
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Overview
The United States Army Chemical Materials Activity (CMA) is a U.S. Army organization dedicated to the safe management of legacy chemical warfare materiel. It is a unit of the United States Army Sustainment Command within the Army Materiel Command structure. Unlike a commercial brand, CMA is a government activity whose work concerns national security, hazardous-material stewardship, environmental protection, public safety, and compliance with international chemical-weapons obligations. CMA was formed by combining elements of the former United States Army Soldier and Biological Chemical Command and the former Program Manager for Chemical Demilitarization. The consolidation brought chemical-agent and munitions storage, stockpile management, demilitarization coordination, and related technical responsibilities into a more unified organization. CMA subsequently managed the U.S. chemical-weapons stockpile at nine locations and was responsible for destruction operations at seven of them. The two remaining stockpile locations, Pueblo, Colorado, and Blue Grass, Kentucky, are associated with the Department of Defense Assembled Chemical Weapons Alternatives program for destruction activities. The activity's responsibilities have included secure storage, inventory control, maintenance, recovery, characterization, assessment, treatment, and disposal of chemical warfare materials. Its mission is framed around protecting workers, surrounding communities, the public, and the environment while ensuring that hazardous legacy materials remain controlled until final treatment or destruction. CMA has operated a National Inventory Control Point and a National Maintenance Point to support safe storage and sustainment of the remaining stockpile during its storage life. The organization has also played a central role in the destruction of declared U.S. chemical-weapons stockpiles. Its stockpile-elimination work used both high-temperature incineration and chemical neutralization, selected according to the characteristics of the material and the configuration of each site. Incineration was used at several major munitions facilities, while neutralization was used for bulk chemical-agent inventories such as mustard and VX. CMA completed destruction at the seven sites under its responsibility in January 2012, accounting for 89.75 percent of the U.S. chemical-weapons stockpile declared under the 1997 Chemical Weapons Convention framework. Beyond declared stockpiles, CMA's Recovered Chemical Materiel Directorate manages recovered or non-stockpile chemical warfare materiel. The program responds to discoveries at military installations, former defense sites, and civilian communities. Specialized non-intrusive assessment systems help identify chemical fills and explosive components before treatment. On-site systems are designed to contain blast, agent, and vapor hazards during processing. CMA also administers the Chemical Stockpile Emergency Preparedness Program in partnership with the Department of Homeland Security and local, state, and federal response agencies. The program supports warning systems, emergency-response equipment, community education, and annual preparedness exercises near chemical stockpile locations. Internationally, CMA shares experience through reporting to the Organisation for the Prohibition of Chemical Weapons and participation in the annual Chemical Weapons Destruction Conference. Its public role is therefore not product marketing but accountable management of hazardous military legacies and support for the United States' chemical-weapons destruction commitments.
History
The Chemical Materials Activity emerged from the U.S. Army's effort to consolidate responsibilities for legacy chemical-agent and chemical-munitions management. Its organizational predecessors included the United States Army Soldier and Biological Chemical Command and the Program Manager for Chemical Demilitarization. By bringing these functions together, the Army created a single activity able to coordinate storage, inventory control, demilitarization, recovery, and related safety responsibilities. CMA managed the U.S. chemical-weapons stockpile at nine storage locations and held responsibility for destruction at seven of them. The organization operated in the context of the United States' obligations under the Chemical Weapons Convention, an international treaty opened for signature in 1997. Its work covered not only the physical destruction of chemical weapons but also the safe custody of materials before destruction, emergency planning for nearby communities, and communication of technical experience to international partners. The stockpile-destruction mission used two principal technological approaches. Incineration was selected by the Army in 1985 after comparative testing and was applied at facilities including Johnston Atoll, Anniston, Pine Bluff, Umatilla, and Tooele. Johnston Atoll Chemical Agent Disposal System completed operations in November 2000; the facility was subsequently dismantled and the atoll was restored as a wildlife refuge. Other facilities closed as their missions ended: Aberdeen in 2005, Newport in 2008, Pine Bluff in 2010, Anniston and Umatilla in 2011, and Tooele in 2012. Neutralization was used for bulk-agent inventories stored without explosive or other weapon components. The process used hot water, or hot water combined with sodium hydroxide, to chemically break down the agent. Resulting hydrolysate was transferred to permitted commercial hazardous-waste facilities for further treatment and disposal. Neutralization was used at Edgewood in Maryland for mustard agent and at Newport in Indiana for VX. It was also selected for the Department of Defense's Assembled Chemical Weapons Alternatives facilities in Pueblo, Colorado, and Richmond, Kentucky, although those destruction activities were outside CMA's primary stockpile-destruction responsibility. CMA's broader non-stockpile mission began with the Non-Stockpile Chemical Materiel Project, established in 1992 to provide centralized Department of Defense management for declared chemical materiel outside the main stockpile. This function later became the Recovered Chemical Materiel Directorate. Its work includes responding to recovered items, determining their chemical contents and explosive characteristics without unnecessary intrusion, and treating them through systems designed to contain hazardous effects. The activity also supports communities near stockpile sites through the Chemical Stockpile Emergency Preparedness Program. Working with the Department of Homeland Security and other public agencies, the program has supported warning systems, response equipment, public information, and recurring emergency exercises. CMA's headquarters is located in the Edgewood Area of Aberdeen Proving Ground, Maryland, with site teams positioned at relevant stockpile locations. CMA completed demolition of the nation's former chemical-warfare production facilities in December 2006 and completed destruction of the U.S. binary chemical-weapons inventory in November 2007. In January 2012, it completed destruction of all stockpiled chemical weapons at the seven sites for which it was responsible, representing 89.75 percent of the U.S. stockpile declared under the applicable treaty framework. Its continuing role centers on secure custody, recovered-material response, preparedness, and support for the remaining portions of the national chemical-weapons demilitarization mission.
- 2012
Seven-site stockpile destruction mission completed
[1]CMA completed destruction of all stockpiled chemical weapons at the seven sites under its responsibility, representing 89.75 percent of the U.S. declared stockpile.
- 2011
Anniston and Umatilla facilities closed
[1]The Anniston Chemical Agent Disposal Facility and Umatilla Chemical Agent Disposal Facility completed their missions; Umatilla Chemical Depot also closed.
- 2010
Pine Bluff disposal facility closed
[1]The Pine Bluff Chemical Agent Disposal Facility in Arkansas ended operations.
- 2008
Newport facility and depot closed
[1]The Newport Chemical Agent Disposal Facility completed its mission, and Newport Chemical Depot closed.
- 2007
Binary chemical-weapons inventory destroyed
[1]CMA completed destruction of the U.S. binary chemical-weapons inventory in November.
- 2006
Former chemical-warfare production facilities demolished
[1]CMA completed demolition of the nation's former chemical-warfare production facilities in December.
- 2005
Aberdeen disposal facility closed
[1]The Aberdeen Chemical Agent Disposal Facility ended operations in Maryland.
- 2000
Johnston Atoll disposal facility completed operations
[1]The Johnston Atoll Chemical Agent Disposal System completed destruction operations in November, after which the facility was dismantled.
- 1992
Non-Stockpile Chemical Materiel Project established
[1]The Army created a centralized program for managing the destruction of declared chemical materiel outside the main stockpile.
- 1985
Incineration selected for stockpile destruction
[1]The U.S. Army selected incineration as its stockpile chemical-weapons disposal technology after testing and comparison of alternative methods.
Products and positioning
A U.S. Army stewardship and demilitarization organization focused on secure chemical-materials management, risk reduction, environmental protection, emergency preparedness, and implementation of chemical-weapons destruction obligations.
Hazardous-material stewardship
Chemical stockpile storage and inventory management
CMA maintains secure custody of remaining U.S. chemical-weapons materials before final treatment or destruction. This function includes inventory control, maintenance, site security coordination, condition monitoring, and technical support intended to protect personnel, the public, and the environment throughout the remaining storage period.
Chemical-materials destruction
Chemical-weapons demilitarization
The demilitarization mission covered treatment and disposal of chemical munitions and bulk chemical agents. Depending on the material and facility, CMA-associated operations used incineration or neutralization, followed by controlled management of residual materials and wastes.
Recovered hazardous-material response · 1992
Recovered Chemical Materiel Directorate
The Recovered Chemical Materiel Directorate handles recovered chemical warfare materiel outside the principal stockpile. Its specialized assessment systems help determine chemical contents and explosive hazards with minimal intrusion, enabling safe treatment in systems designed to contain blast, agent, and vapor.
Emergency preparedness
Chemical Stockpile Emergency Preparedness Program
CSEPP is conducted with the Department of Homeland Security and public-safety agencies around chemical stockpile sites. It supports warning systems, emergency-response equipment, public education, and recurring community exercises intended to improve readiness for a potential chemical-stockpile incident.
Brand decisions
1985
Adoption of incineration for stockpile destructionStrategyBackground
The Army evaluated multiple disposal technologies for the declared chemical-weapons stockpile.
Action taken
It selected incineration for applicable stockpile destruction operations, while later using neutralization for certain bulk-agent inventories.
Aftermath
Incineration was used at several major disposal facilities, including Johnston Atoll, Anniston, Pine Bluff, Umatilla, and Tooele.
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