Perry Johnson Laboratory Accreditation, Inc.

ISO/IEC 17025:2005 Accredited 

pdf buttonISO Certificate of Accreditation

Statement of Supplier Qualification

Department of Ecology Scopes and Certificates

pdf buttonWen Lab Certificate & Scope

pdf buttonYak Lab Certificate & Scope



Washington State Department of Ecology

Methods:  Inorganic, Organic, Microbiology     ~     Matrices:  Water, Wastewater, Solids

Washington State Department of Health

Methods:  Inorganic, Microbiology     ~     Matrices:  Drinking Water



Soils Science Society of America

Methods:  Agricultural     ~     Matrices:  Soils, Water


Reference Sample Programs

Analytical Products Group (APG)

Methods:  Metals, Minerals, Nutrients     ~     Matrix:  Water

RTC Proficiency Testing

Methods:  Metals     ~     Matrix:  Solids

National Agricultural Proficiency Testing (NAPT)    PAP-Accreditied-Stamp no date 

Performance Assessment Program Participant

Methods:  Metals, Minerals, Nutrients     ~     Matrix:  Soil, Agricultural

American Proficiency Institute (API)

Methods:  Microbiology     ~     Matrix:  Food

Environmental Resource Associates (ERA)

Methods:  Microbiology     ~     Matrix:  Water


Methods:  Microbiology     ~     Matrix:  Water

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