Environmental Laboratory Accreditation Program (ELAP)

MISSION: To implement a sustainable accreditation program that ensures laboratories generate environmental and public health data of known, consistent, and documented quality to meet stakeholder needs.

VISION: Through effective program implementation and continuous improvement of ELAP, California will utilize the highest quality scientific data as a foundation for its environmental and public health programs and decisions.

Important News – Be In the Know!

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About ELAP

Who we are and what we do.

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Apply for Accreditation

Application forms, Fields of Accreditation Tables, and fee information.

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Roadmap to ELAP Accreditation

Resources to help ELAP laboratories comply with regulations that went into effect on January 1, 2021.

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Proficiency Testing

Guidance on proficiency testing (PT) requirements and tools to help you create a plan for your laboratory.

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Laboratory Assessments

Information about laboratory assessments by ELAP and third-party assessment (TPA) agencies.

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Enforcement advisories and historical enforcement actions against accredited laboratories.

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Methods Update Rule

Information related to methods affected by the US EPA’s method update rule.

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Environmental Laboratory Technical Advisory Committee (ELTAC)

Our advisory committee provides scientific advice to ELAP and the California regulatory agencies that use data from accredited laboratories.

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Laws and Regulations

Links to current ELAP laws and regulations.

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Frequently Asked Questions

A list of FAQs to answer all your important questions.

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ELAP Forms and Checklists

All the forms and checklists you need in one place.

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Contact Us

Get in touch with ELAP.

Subscribe to our ELAP email list to receive notifications and the latest updates.

Map of Accredited Laboratories

Timeline Guidance Tool

New and Improved! For assistance planning when to have your assessment, schedule your proficiency testing, and submit your application, please use our Timeline Guidance Tool.

2023 ELAP Guidance Tool

Report a Laboratory

Register Now for ELAPCON 2024!

Registration is OPEN for 2024 ELAP Conference through May 29, 2024. Visit the ELAP Conference webpage for conference details and registration!

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