National Voluntary Laboratory Accreditation Program (NVLAP)

The National Voluntary Laboratory Accreditation Program (NVLAP) is a federal program run by the National Institute of Standards and Technology that provides third-party accreditation to laboratories in the U.S.

NVLAP tests laboratories for accordance with NVLAP management and technical requirements, which includes requirements in quality systems, personnel, environmental conditions, test and calibration methods, equipment, test quality assurance and reporting results.

NVLAP accreditation is available, though not required, for commercial, university and federal laboratories. If a laboratory is found to achieve the NVLAP standards, they may use their accredited status on reports and in business.  

Read more:

The National Institute of Standards and Technology's offical NVLAP page