Welcome to the State of California 

Environmental Laboratory Accreditation Program (ELAP)

Last Update:  July 21, 2014

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. The ELAP-accredited laboratories have demonstrated capability to analyze environmental samples using approved methods. 


  • Reorganization:   On July 1, 2014, the Drinking Water Program  and ELAP transferred from CDPH to the State Water Resources Control Board (SWRCB). Find out more at http://www.swrcb.ca.gov/drinkingwater/index.shtml.
  • Hexavalent chromium: Certified laboratories for testing hexavalent chromium in drinking water are listed below. Public water systems outside of California should be aware that California's method currently uses a 1-ppb detection limit for purposes of reporting (DLR). However, analytical results at concentrations below the DLR may be reported when laboratories have associated quality assurance data for their results. California’s current DLR is associated with the hexavalent chromium maximum contaminant level (MCL), which was effective on July 1, 2014. Follow this link for additional information.
  • NOTE:  When you click to open Excel files (e.g., FOT Forms), you may see the Windows Security dialog box asking for user name and password. It is a known issue that is yet to be resolved. To work around this, close the dialog box(es) and the file will open.
Technical and Archived Information
Statutes and Regulations (Links to Codes)
ELAP - Program Information
Advisory Committee
Last modified on: 7/28/2014 1:28 PM