National Environmental Laboratory Accreditation Program (NELAP)

The National Environmental Laboratory Accreditation Program (NELAP) is a system that ensures environmental testing labs meet consistent quality standards for analyzing water, air, soil, and waste samples. Managed nationally, it certifies laboratories through a rigorous evaluation process, verifying their technical competence and quality assurance practices. This accreditation helps guarantee that laboratory results are accurate, reliable, and trustworthy, supporting effective environmental protection and regulatory decisions across the United States.