A Nationally Recognized Testing Laboratory is a testing facility recognized by OSHA as primarily private sector organizations that provide product safety testing and certification services to manufacturers. The testing and certification are done, for purposes of the Program, to U.S. consensus-based product safety test standards. These test standards are not developed or issued by OSHA, but are issued by U.S. standards organizations, such as the American National Standards Institute (ANSI). The range of products covered by the Program is limited to those items for which OSHA safety standards require "certification" by an NRTL.

OSHA

Occupational Safety and Health Administration

The United States Occupational Safety and Health Administration is an agency of the United States Department of Labor. It was created by Congress of the United States under the Occupational Safety and Health Act, signed by President Richard M. Nixon, on December 29, 1970...

, an agency of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 Department of Labor

United States Department of Labor

The United States Department of Labor is a Cabinet department of the United States government responsible for occupational safety, wage and hour standards, unemployment insurance benefits, re-employment services, and some economic statistics. Many U.S. states also have such departments. The...

, publishes a list of Nationally Recognized Testing Laboratories (NRTLs). The testing laboratories test products and certify if they pass standards tests.

Organizations Currently Recognized by OSHA as NRTLs:

• Canadian Standards Association
  Canadian Standards Association
  The Canadian Standards Association, also known as the CSA, is a not-for-profit Standards organization with the stated aim of developing standards for use in 57 different areas of specialisation...
  
   (CSA) (also known as CSA International
  CSA International
  CSA International , a member of the CSA Group, is a provider of product testing and certification services for electrical, mechanical, plumbing, gas and a variety of other products...
  
  )
• Communication Certification Laboratory, Inc. (CCL)
• Curtis-Straus LLC (CSL)
• Electrical Reliability Services, Inc. (ERS) (also known as eti Conformity Services and formerly Electro-Test, Inc. (ETI))
• FM Approvals LLC (FM) (formerly Factory Mutual Research Corporation)
• Intertek Testing Services NA, Inc.
  Intertek Group
  Intertek Group plc is a global inspection, product testing and certification company headquartered in London, United Kingdom. It is the largest tester of consumer goods in the world and has a network of more than 1,000 laboratories in over 100 countries....
  
   (ITSNA) (formerly ETL)
• MET Laboratories, Inc.
  MET Laboratories, Inc.
  MET Laboratories, Inc is an independent electrical testing and certification lab, recognized by the Occupational Safety and Health Administration...
  
   (MET)
• NSF International
  NSF International
  NSF International is an Ann Arbor, Michigan-based not-for-profit public health and environmental organization that provides standards development, product certification, auditing, education and risk management services.-History:...
  
   (NSF)
• National Technical Systems, Inc. (NTS)
• QPS Evaluation Services, Inc. (QPS)
• SGS U.S. Testing Company, Inc.
  Société Générale de Surveillance
  SGS S.A. provides inspection, verification, testing and certification services. With more than 67,000 employees, SGS operates of over 1,250 offices and laboratories around the world....
  
   (SGSUS) (formerly UST-CA)
• Southwest Research Institute
  Southwest Research Institute
  Southwest Research Institute , headquartered in San Antonio, Texas, is one of the oldest and largest independent, nonprofit, applied research and development organizations in the United States...
  
   (SWRI)
• Technischer Überwachungsverein
  Technischer Überwachungsverein
  TÜVs are German organizations that work to validate the safety of products of all kinds to protect humans and the environment against hazards. As independent consultants, they examine plants, motor vehicles, energy installations, devices and products TÜVs (short for Technischer...
  
   (TÜV)
• Underwriters Laboratories
  Underwriters Laboratories
  Underwriters Laboratories Inc. is an independent product safety certification organization. Established in 1894, the company has its headquarters in Northbrook, Illinois. UL develops standards and test procedures for products, materials, components, assemblies, tools and equipment, chiefly dealing...
  
   Inc. (UL)
• Wyle Laboratories
  Wyle Laboratories
  Wyle is a privately held provider of specialized engineering, scientific and technical services to the Department of Defense, NASA, and a variety of commercial customers primarily in the aerospace industry...
  
  , Inc. (WL)