Headquartered at Aberdeen Proving Ground, Maryland, the U.S. Army Chemical Materials Activity (CMA) director serves as the treaty implementing agent, delegated by the Department of Defense (DOD) to support United States compliance with the international Chemical Weapons Convention treaty. The CMA Center for Treaty Implementation and Compliance manages our Nation’s treaty implementation and compliance activities, including declared recovered chemical warfare materiel and single small-scale facilities.
As the program executioner for the DOD Recovered Chemical Warfare Materiel Program, CMA supports Army readiness by assessing and destroying chemical warfare materiel using transportable technologies wherever it is recovered in the United States. CMA’s Recovered Chemical Materiel Directorate provides centralized management and direction to DOD for the assessment and destruction of recovered chemical warfare materiel in a safe and environmentally compliant manner.
CMA provides DOD the expertise for safe and secure storage of chemical warfare materiel pending its destruction. The Army draws on CMA’s extensive knowledge and experience in managing chemical agent and munition assessment and destruction, storage facility design, safe handling and accountability processes to posture other nations’ stockpiles for destruction in compliance with the Chemical Weapons Convention treaty, if required. CMA also stood up Redstone Chemical Activity (CMA RCA) to support the Army’s investigative environmental remediation and storage activities at Redstone Arsenal in Huntsville, Alabama.
Assess and destroy chemical warfare materiel, comply with chemical weapons treaty, protect people and the environment.
In 2003 the Army combined elements from the U.S. Army Soldier and Biological Chemical Command and Program Manager for Chemical Demilitarization to consolidate the Army’s chemical agent, munitions storage and demilitarization functions under a single organization. The U.S. Army Chemical Materials Agency (CMA), a major subordinate command of the U.S. Army Materiel Command (AMC), managed the nine chemical weapons stockpiles, assessed and destroyed recovered chemical warfare materiel, and managed the Chemical Stockpile Emergency Preparedness Program to support communities around the stockpile sites.
The nine stockpile sites were located at Umatilla Chemical Depot in Oregon; Deseret Chemical Depot in Utah; Pueblo Chemical Depot in Colorado; Pine Bluff Chemical Activity at Pine Bluff Arsenal, Arkansas; Newport Chemical Depot in Indiana; Blue Grass Chemical Activity at Blue Grass Army Depot, Kentucky; Anniston Chemical Activity at Anniston Army Depot, Alabama; Edgewood Chemical Activity at Aberdeen Proving Ground, Maryland, and Johnston Atoll Chemical Agent Disposal System (JACADS) on Johnston Atoll in the Pacific Ocean, about 750 miles southwest of Hawaii.
In December 2006, the Agency completed destroying the Nation’s former chemical warfare production facilities, binary chemical weapons inventory in November 2007 and declared recovered chemical warfare materiel in 2010. By January 2012, all chemical weapons were destroyed at seven of the nine U.S. stockpile sites, eliminating nearly 90 percent of the original declared chemical stockpile.
In July 2012, the Agency was redesignated from a major subordinate command to an AMC Separate Reporting Activity and renamed the U.S. Army Chemical Materials Activity.
On July 7, 2023 the last declared munition in the domestic chemical weapons stockpile was destroyed at Blue Grass Army Depot, marking the completion of the mission in compliance with the Chemical Weapons Convention.
In January of 2025, CMA stood up Redstone Chemical Activity (RCA) to support the Army’s investigative environmental remediation and storage activities at Redstone Arsenal – once a historical center for chemical weapons production, storage and testing, the arsenal has the potential for a large amount of RCWM. CMA's dedicated personnel also fulfill CMA’s mission at RCWM locations across the Nation.
★ Headquarters – Aberdeen Proving Ground, Maryland
★ Redstone Chemical Activity – Redstone Arsenal, Alabama
★ Recovered Chemical Warfare Materiel Assessment and Treatment – Treatment locations Nationwide
U.S. Army Chemical Materials Activity Headquarters
8435 Hoadley Road (Bldg. E4585)
Aberdeen Proving Ground, Maryland 21010
Email: usarmy.cma.public.affairs@army.mil
The CMA director acts as the United States Army Implementing Agent for executing the Chemical Weapons Convention (CWC) Treaty. In accordance with the CWC, CMA carries out Army Regulation 525-92, which states that CMA’s Center for Treaty Implementation and Compliance (CTIC) manages implementation and compliance activities.
Located at CMA Headquarters at Aberdeen Proving Ground, Maryland, CTIC is part of a U.S. host team for storage, Schedule 1 and destruction inspections that oversees CWC compliance. CTIC prepares initial visits and final engineering reviews by the Organization for the Prohibition of Chemical Weapons (OPCW), the international organization headquartered in The Hague, Netherlands, that verifies CWC implementation.
CTIC is also responsible for all notifications, reports and briefings submitted to the OPCW Technical Secretariat, and assists Army sites with refuting allegations during challenge inspections. The United States is responsible for hosting ambassador-level visits for the OPCW Executive Council for an overview of the destruction programs.
On April 29, 1997, the Convention on the Prohibition of the Development, Production, Stockpiling, and Use of Chemical Weapons and on Their Destruction, known as the Chemical Weapons Convention (CWC), entered into force. At that time, the United States and 86 other nations became the first countries to sign and ratify the CWC. In doing so, the United States agreed to destroy all their chemical weapons and former chemical weapons production facilities and to abide by prohibitions from development, use, production and acquisition of chemical weapons. As of 2016, more than 192 nations have ratified the CWC.
The CWC prohibits the development, production, stockpiling, transfer and use of chemical weapons. The United States is a State Party to the CWC. The Organization for the Prohibition of Chemical Weapons (OPCW), an international organization headquartered in The Hague, Netherlands, oversees Convention implementation.
The CWC prohibits States Parties from:
The CWC also requires States Parties with chemical weapons or chemical weapons production facilities to destroy them in an environmentally safe manner. It forbids disposal by open pit burning, land burial or dumping in any water body.
The U.S. Army Chemical Materials Activity (CMA) Recovered Chemical Materiel Directorate (RCMD) provides centralized management and direction to the Department of Defense for the assessment and disposal of recovered chemical warfare materiel (RCWM) in a safe and environmentally compliant manner.
RCMD leads the nation in the development and utilization of advanced technology to destroy RCWM. In 1997, the United States entered into force of the Chemical Weapons Convention (CWC), an international treaty requiring the destruction of chemical weapons.
In support of U.S. treaty obligations, CMA RCMD maintains the technology and personnel expertise to continue to destroy chemical warfare materiel around the country.
The Recovered Chemical Materiel Directorate uses the Mobile Munitions Assessment System (MMAS) to provide analysis of recovered items with unknown fills. MMAS uses non-intrusive assessment equipment to rapidly provide detailed information on recovered items and distribute that information to appropriate authorities, reducing risk to the public, military and emergency personnel.
Mobile Munitions Assessment System (MMAS) provides analysis of recovered items with unknown fills by:
1- Portable Isotopic Neutron Spectroscopy System (PINS)
PINS accurately detects the presence of chemical elements by using neutron particles to produce a unique energy spectrum emitted by chemicals inside the munition.
2- Digital Radiography & Computed Tomography System (DRCT)
DRCT uses X-ray technology to vertically scan recovered munitions on a rotating platform, reproducing a high- quality digital image of their interiors to determine whether a liquid fill is present as well as the explosive potential of the item.
3- Raman Spectrometer
Raman Spectrometer identifies the contents of glass bottles that were part of Chemical Agent Identification Sets (CAIS), used for training decades ago. This technology uses a fiber optic probe and laser.
After suspect recovered chemical warfare materiel (RCWM) is discovered, the Recovered Chemical Materiel Directorate (RCMD) deploys equipment to determine if the items are explosively configured and contain a liquid fill. The recovered item is overpacked in a multiple round container (MRC). This allows for safe assessment, storage and transport.
MRCs were specifically designed, tested and fielded for the transport of chemical warfare materiel and are the only containers approved by the Department of Transportation for this purpose. MRCs exceed international packaging requirements. Each MRC contains one munition, but there are multiple sizes in the MRC family to accommodate a variety of munitions.
Considered “overpack” containers, MRCs are designed to prevent any accidental exposure to the environment in the unlikely event the overpacked items were to leak. Fragile items, such as chemical agent identification sets (CAIS) – glass bottles containing small amounts of chemical agent once used to train Soldiers in the identification and decontamination of chemical agent – may also be transported in MRCs.
Safe treatment of recovered chemical warfare materiel (RCWM) relies on thorough assessment, packaging and storage before the destruction solution is deployed. RCMD’s proven assessment technologies provide critical information on site during suspect CWM recoveries, determining whether a munition is explosively configured or contains chemical agent.
DRCT technology is a transportable, non-intrusive assessment system that analyzes and provides on-site information about the contents of unidentified munitions without opening them. This greatly reduces risk to the public, workers and emergency response personnel by rapidly obtaining detailed information and distributing it to the appropriate authorities and responders.
The Recovered Chemical Materiel Directorate uses PINS as a transportable non-intrusive assessment system to analyze and provide on-site information about the contents of unidentified munitions without opening them. This greatly reduces risk to the public, workers and emergency response personnel by rapidly obtaining detailed information and distributing it to the appropriate authorities and responders.
The Raman Spectrometer identifies the contents of Chemical Agent Identification Sets (CAIS), glass vials containing various agents and industrial chemicals once used to train soldiers. The Raman Spectrometer rapidly obtains detailed information about suspect chemical warfare materiel and distributes that information to the appropriate authorities and responder personnel, greatly reducing the risk to the public, workers and emergency response personnel.
Recovered Chemical Warfare Materiel (RCWM) requires safe and secure storage pending destruction due to their often-deteriorated conditions. Interim holding facilities (IHF) provide safe, temporary storage for recovered chemical warfare materiel at sites where storage facilities, such as igloos and bunkers, are unavailable.
Engineers developed stringent construction and safety requirements for the IHF. The IHF’s design allows for the installation of a chemical agent filtration system, if necessary. The facilities consist of fireproof and corrosion-resistant materials. Light switches and fixtures, outlets and air conditioners must meet strict non-explosive design requirements to reduce the risk of fire inside the IHF. Additionally, the IHF includes a secondary containment area below the floor that would contain liquids should a leak occur. The IHF includes high-security locks and remains enclosed in a fenced area. Automatic lights attached to the IHF maximize lighting at night. Additionally, a visual security system and agent monitoring of the IHF is conducted until the recovered items are removed for treatment.
The U.S. Department of Defense has tested and disposed of chemical warfare materiel at military installations in the United States and its territories since 1918. These sites include active military installations, closed installations, land turned over to other government agencies and land transferred to private ownership. Range clearing operations and environmental remediation activities will often unearth old chemical warfare materiel.
In January 1995, the U.S. Army Materiel Command (AMC) established the Materiel Assessment Review Board, or MARB, to make decisions for the Department of the Army regarding recovered suspected chemical warfare materiel. Many munitions and containers recovered from old burial sites at these installations lack identifying marks due to age and condition. This makes identification difficult and requires the use of non-destructive and non-intrusive methods to identify the item, its fill and status of its firing abilities. The MARB aids in the Army’s effort to accurately assess and treat recovered chemical warfare materiel.
In addition to extensive assessment and destruction experience, RCMD possesses the programmatic, logistic and project management expertise to meet the needs of the Recovered Chemical Warfare Materiel (RCWM) Program.
When items are identified as chemical filled, destruction technologies safely and effectively destroy munitions of all shapes and sizes — providing complete containment of the neutralization process while protecting operators, the community and environment. RCMD maintains and deploys the following destruction technologies: Explosive Destruction System (EDS), Single CAIS Access and Neutralization System (SCANS), Transportable Detonation Chamber (TDC), Large Item Transportable Access and Neutralization System (LITANS) and Magnetic Induction Decontamination System (MIDS).
The Explosive Destruction System (EDS) provides on-site treatment of chemical warfare materiel in a safe, environmentally compliant manner.
The LITANS treats large RCWM items, such as ton containers, that are not treatable through other RCMD technologies.
★ VIEW THE LITANS FACT SHEET ★
The SCANS is a portable chemical reactor system that treats small quantities of chemical agent found in CAIS items. CAIS items were used to train Soldiers in the identification and disposal of chemical agent.
Destruction of chemical warfare materiel results in the creation of secondary waste. The Recovered Chemical Materiel Directorate (RCMD) disposes of secondary waste at permitted commercial treatment, storage and disposal facilities.
This waste includes neutralents and remaining compounds that, although a byproduct of chemical weapons material destruction, are free of compounds controlled by the Chemical Weapons Convention (CWC) treaty. The handling and disposal of this waste remains consistent with methods used for disposal of hazardous and non-hazardous waste, which is regulated by federal and state agencies to ensure safe handling.
RCMD disposes of chemical materiel in a safe, environmentally compliant and cost-effective manner, ensuring compliance with the CWC. This may include chemicals and equipment used to produce some types of weapons, items recovered from military ranges and test kits once used to train Soldiers about chemical weapons.
The U.S. Army Non-Stockpile Chemical Materiel Project (NSCMP) was created in 1992 to support the assessment and treatment of chemical warfare materiel that was not part of the nation’s chemical weapons stockpile.
NSCMP’s expertise has transferred to the Recovered Chemical Materiel Directorate (RCMD), U.S. Army Chemical Materials Activity (CMA). RCMD leads the nation in the development and utilization of advanced technology to treat recovered chemical warfare materiel.
In compliance with the treaty, CMA RCMD was tasked with destroying all non-stockpile chemical weapons and former chemical warfare production facilities. CMA RCMD safely completed all major treaty destruction missions ahead of schedule. CMA RCMD continues to assess and destroy RCWM as it is recovered, reporting all declared items to the Organization for the Prohibition of Chemical Weapons, the international organization that verifies treaty compliance.
Provide tools, tactics and technologies to strengthen the Soldier’s knowledge base in the assessment and treatment of chemical warfare materiel.
Proven, transportable assessment technologies to quickly respond to planned and unplanned recoveries on site, most often in response to items unearthed during range clearing operations and from relic burial sites.
On-site destruction of RCWM using proven technologies that safely and effectively neutralize chemical warfare materiel while protecting operators, the community and the environment.
When an item of chemical and explosive concern is recovered, CMA RCMD deploys its proven assessment technologies to the site to determine whether a munition is explosively configured or contains chemical agent.
When items are identified as containing chemical agent, CMA RCMD treatment technologies safely and effectively destroy munitions of all shapes and sizes, providing complete containment of the neutralization process while protecting operators, the community and the environment.
Not all assessments result in a finding of recovered chemical warfare materiel. If the item does not contain chemical warfare materiel, it is disposed of locally.
CMA stood up Redstone Chemical Activity (CMA RCA) to support the Army’s investigative, environmental remediation and storage activities at Redstone Arsenal in Huntsville, Alabama. Due to its historical position as a center for chemical weapons production, storage, evaluation and demilitarization, the arsenal has the potential for a large amount of recovered chemical warfare materiel (RCWM). CMA RCA’s four primary areas of responsibility are storage, commodity management, security, and technical expertise.
CMA RCA is responsible for the safe and regulatory-compliant storage of all RCWM, conventional munitions and explosives, and miscellaneous wastes generated during investigative and remediation operations. The Activity is also tasked with supporting emergency response and providing courtesy storage of explosive waste derived from other organizations at Redstone.
CMA RCA researches and provides packaging configurations for all hazardous waste, waste military munitions, and RCWM in compliance with Title 49 of the Code of Federal Regulations. CMA RCA coordinates Special Packaging Instructions and Interim Hazard Classifications for items without a prescribed package method. CMA RCA ensures compliance with the Alabama Department of Environmental Management Hazardous Waste Resource Conservation and Recovery Act permit, including conducting and documenting required storage inspections.
CMA RCA performs and validates inventory and accountability of RCWM, all unknown conventional munitions and explosives recovered during investigative and remediation activities, as well as hazardous wastes generated.
Accountability for all RCWM recovered at the Arsenal is accomplished through the Chemical Accountability Management Information Network (CAMIN), which is managed by CMA. CMA RCA also provides external custodial support for CAMIN input and maintains a local database to track all recovered materiel through final disposition.
CMA RCA is the focal point for explosives safety in transportation, storage, packaging and handling for all operations of recovered materiel, providing direct support to the U.S. Army Garrison-Redstone Arsenal (USAG-RSA), CBRNE (Chemical, Biological, Radiological, Nuclear, Explosive) Analytical and Remediation Activity–Remediation Response West, U.S. Army Corps of Engineers - Huntsville, and the site contractor.
CMA RCA provides local certification and recertification of overpack containers used at Redstone, participates in site-planning efforts and reviews of storage operations plans and procedures for compliance with Army and Department of Defense explosives safety requirements, and develops and submits explosive waivers and deviations for approval. CMA RCA provides external support as needed for Army chemical training instruction for the Defense Ammunition Center, Combatant Command (COCOM), and backup CAMIN support for CMA headquarters.
CMA RCA additionally provides support for the Prototype Recovered Ordnance Destruction System being established at USAG-RSA for destruction of recovered conventional munitions. The CMA Recovered Chemical Materiel Directorate owns, maintains, and deploys the Explosive Destruction System to destroy RCWM and will work closely with CMA RCA for any recovered at Redstone Arsenal.
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Do you want more information about the Chemical Weapons Convention?
Find out more:
▶ Chemical Materials Activity FY25-26 Fact Sheet
▶ Chemical Materials Activity Overview
▶ Center for Treaty Implementation & Compliance
▶ Chemical Accountability Management Information Network
▶ Chemical Stockpile Emergency Preparedness Program
▶ Recovered Chemical Materiel Directorate CMD Overview
▶ What Are Chemical Agents & Chemical Weapons? Fact Sheet
▶ What is Recovered Chemical Warfare Materiel (RCWM)
▶ RCMD Lifecycle of Deployment Fact Sheet
▶ Mobile Munitions Assessment System (MMAS)
▶ Multiple Round Container (MRC)
▶ Universal Munition Storage Container (UMSC)
▶ Digital Radiography & Computed Tomography System (DRCT) Fact Sheet
▶ Portable Isotopic Neutron Spectroscopy (PINS) Fact Sheet
▶ Raman Spectrometer Fact Sheet
▶ Non-Intrusive Threat Detection System (NITDS) Fact Sheet
▶ QL 0-(2-Diidopropylaminoethyl) O'-Ethyl Methylphosphonite Fact Sheet
▶ Materiel Assessment Review Board (MARB)
▶ Explosive Destruction System (EDS) Overview
▶ Single CAIS Access & Neutralization System (SCANS) Fact Sheet
▶ Large Item Transportable Access & Neutralization System (LITANS)
▶ Mobile Command Post (MCP) Fact Sheet
▶ Interim Holding Facility (IHF)
▶ RCMD Operations at Dover Air Force Base
▶ RCMD Operations at Pine Bluff Arsenal
▶ RCMD Operations at Redstone Arsenal
▶ Former Production Facilities Demolition
▶ Chemical Weapons Destruction Expertise Fact Sheet
▶ Sulfur Mustard Agents Fact Sheet
▶ Chemical Agent Identification Sets Fact Sheet