Welcome to the State Water Resources Control Board Welcome to the California Environmental Protection Agency
Governor's Website Visit the Water Board Members Page
My Water Quality
Performance Report

Environmental Laboratory Accreditation Program (ELAP)


ELAP provides evaluation and accreditation of environmental testing laboratories to ensure the quality of analytical data used for regulatory purposes to meet the requirements of the State's drinking water, wastewater, shellfish, food, and hazardous waste programs. The State agencies that monitor the environment use the analytical data from these accredited laboratories. ELAP-accredited laboratories have demonstrated capability to analyze environmental samples using approved methods.











More Information

elap_gis LOOKING FOR A LAB? Search our Geographic Information System (GIS) Map to find ELAP-accredited laboratories.

elap_email Be in the know! Sign up for ELAP’s email subscription to receive program updates and announcements.

  • Enter your information and select ELAP under the “General Interest” tab

elap_newsletter Read the current edition of ELAP’s Newsletter, The Lab Report.

Contact ELAP:

  • ELAP General Email Address: elapca@waterboards.ca.gov
    • Use this email address to submit your application and for questions regarding application procedures and statuses.
  • Proficiency Testing Questions: elapca_pt@waterboards.ca.gov
    • For questions regarding Proficiency Testing requirements, email our PT Unit directly.
  • Technical Questions: elapca_technical@waterboards.ca.gov
    • To obtain technical guidance regarding method and laboratory procedures, email our technical inbox. This inbox is also used to submit Change of Personnel requests.
  • Comments: elapca_comments@waterboards.ca.gov
    • This inbox is used when ELAP has requested comments on program reforms, proposals, and regulations development. You may also submit comments outside of those times on any topics.