About Us

A2LA is the only independent, 501(c)3, non-profit, internationally-recognized accreditation body in the United States that offers a full range of comprehensive laboratory and laboratory-related accreditation services.

Established in 1978 as a non-profit, public service membership society, A2LA is dedicated to the formal recognition of competent testing and calibration laboratories, inspection bodies, proficiency testing providers, and reference material producers.

A2LA offers three main service lines to support recognition of competence in laboratory and laboratory-related industries.


Accreditation is synonymous with both quality and competence of an organization, through the use of international standard(s). A2LA is a third-party body that performs accreditations to various international standards, ensuring an unbiased and objective evaluation of your organization’s functions. A2LA provides a range of accreditation programs using international standards, including:

ISO/IEC 17025 for Testing/Calibration Laboratories                                   ISO 15189 and CLIA for Clinical Testing Laboratories

ISO/IEC 17020 for Inspection Bodies                                                             ISO/IEC 17043 for Proficiency Testing Providers

ISO/IEC 17065 for Product Certification Bodies                                           ISO 17034 for Reference Material Producers

Technical Forum

The A2LA Technical Forum has grown to become one of the largest, multidiscipline events in the accreditation industry, attracting attendees from over 12 different industries, including automotive, environmental, pharmaceutical, calibration, and more. The forum promotes discussion and training on topics related to the accreditation industry through face-to-face interactions with staff, members, assessors, accredited organizations and other interested parties. The goal is to further strengthen the value of accreditation for all stakeholders. Join a global group of industry professionals for:

Training and educational meetings on best practices

Accreditation program-specific technical meetings

Professional development opportunities                                       

Networking with peers


Although membership is not a requirement for accreditation, we strongly encourage all A2LA-accredited organizations to become members to have a stronger voice in the organization and receive additional membership benefits. Membership provides individuals and organizations with opportunities to participate in the development of new accreditation standards, network with others working in the quality industry, gain valuable knowledge and training in new industries, and to support and promote quality and public safety.

Our members include private organizations and public institutions of all sizes. A2LA membership and accreditation are separate programs.

A2LA has over 3000 actively accredited certificates representing all 50 states, Aruba, Australia, Bahrain, Bangladesh, Brazil,  Canada, Cayman Islands, Chile, Cyprus, Czech Republic, Dominican Republic, Ecuador, Egypt, El Salvador, France, Germany, Greece, Guam, Guatemala, Honduras, Hong Kong, Hungary, India, Israel, Italy, Japan, Kazakhstan, Kuwait, Malaysia, Mexico, the Netherlands, Nigeria, People’s Republic of China, Philippines, Poland, Puerto Rico, Qatar, Saudi Arabia, Singapore, South Korea, Spain, Sweden, Taiwan, Thailand, Trinidad and Tobago, United Arab Emirates, the United Kingdom and Vietnam. For a current listed of A2LA’s accredited organizations, please search our directory here: portal.A2LA.org/search  

Note:  The organizations in foreign economies pursued accreditation from A2LA due mostly to their desire to meet U.S. regulatory requirements.


Providing independent, world-class accreditation programs that inspire confidence in the quality of services and acceptance of results from accredited organizations.


Accreditation accepted everywhere.


A2LA is governed by a Board of Directors.

Organizations are assessed by trained Assessors who are technical experts in their fields.

Accreditation decisions are made by the Accreditation Council.

Day-to-day operation of the organization is handled by the Staff Members at A2LA Headquarters in Frederick, MD.

A2LA Accreditation Agreements

To ensure the acceptance of work performed by A2LA-accredited organizations, A2LA has sought recognition and approval from international, domestic, and industry groups. Our accreditation programs are internationally-recognized and based on globally-accepted criteria resulting in A2LA’s signatory status with the following international recognition arrangements:

International Laboratory Accreditation Cooperation (ILAC) Mutual Recognition Arrangement (MRA)

International Accreditation Forum (IAF) Multilateral Recognition Arrangement (MLA)

Asia Pacific Accreditation Cooperation (APAC) Mutual Recognition Arrangement (MLA)

Inter-American Accreditation Cooperation (IAAC) Multilateral Recognition Arrangement (MLA)

A2LA’s domestic recognitions include Federal, State, Local and industry partner confirmation that A2LA’s programs meeting the highest standards for quality. References to our recognitions can be found here. 

A2LA is committed to providing impartial accreditation service to our customers. It is the policy of A2LA to manage conflict of interest, ensure objectivity of our accreditation activities and safeguard impartiality.