National Environmental Laboratory Accreditation Program (NELAP): NELAP is a program in the United States that provides accreditation for environmental testing laboratories. It evaluates labs based on their ability to perform specific testing methods in compliance with regulatory requirements. United Kingdom Accreditation Service (UKAS): UKAS is the national accreditation body for the United Kingdom. Environmental testing labs can seek Environment Testing lab accreditation from UKAS to demonstrate their competence and compliance with relevant standards.

Environmental Laboratory Approval Program (ELAP): ELAP is a program in California, USA, that offers accreditation to environmental testing laboratories. It ensures that these labs meet specific performance standards for environmental analysis. NATA (National Association of Testing Authorities, Australia): NATA provides accreditation to Australian laboratories, including those conducting environmental testing, to ensure they meet international standards of competence and reliability. ANSI/ASQ National Accreditation Board (ANAB): ANAB offers accreditation services for various industries, including environmental testing laboratories. 

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