A laboratory’s participation in proficiency testing (PT) activities is a requirement of the ISO/IEC 17025:2005 standard. The purpose of this requirement is to provide interested parties with objective evidence of a laboratory’s capability to produce data that is both accurate and repeatable for the activities listed in its scope of accreditation. Favorable proficiency testing data can be used to demonstrate a laboratory’s competence to clients, potential customers, accreditation bodies and other external entities. Participation in proficiency testing activities also provides invaluable feedback in the internal monitoring of a laboratory’s quality system. Through these activities, a laboratory can verify its competence to perform specific calibrations or tests.

The following PT providers have been approved by PJLA for use as a third-party provider. See PJLA: Proficiency Testing Requirements for Applicant and Accredited Laboratories for the details of the requirements or contact the PJLA office for additional information.

National Association for Proficiency Testing (NAPT)
901 Twelve Oaks Center Drive, Suite 920
Wayzata, MN 55391
Contact: Charles Ellis
Telephone: 952-303-6126
Fax: 305-425-5728
E-mail: napt@proficiency.org
Website: www.proficiency.org

AOAC International
481 North Frederick Ave.
Gaithersburg, MD 20877-2417
Phone: 301-924-7077
Fax: 301-924-7089
Website: www.aoac.org

Newage Testing Instruments, Inc.
147 James Way
Southampton, PA 18966
Phone: 326-526-2200
Fax: 326-526-2192
Website: www.hardnesstesters.com

MeasurePT
17043 Governors Drive
PO Box 250
Columbia City, IN 46725
Contact: Carrie Gipe
Phone: 260-244-7450
Fax: 260-244-7905
Website: www.measurept.com

Sapphire Proficiency Testing
950 Peninsula Corp. Circle, Suite 2009
Boca Raton, FL 33487
Phone: 561-999-8948
Fax: 561-999-1897
Current Listing of Available Tests

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