California Laboratory Services is certified with the State of California via the Environmental Laboratory Accreditation Program (ELAP).


CLS Labs utilizes United States Environmental Protection Agency (U.S. EPA) prescribed methods whenever applicable. Other sources of analytical methods may be used for other analyses if widely recognized by industrial and government laboratories.

Industry standard methods are published by U.S. EPA, Standard Methods, American Public Health Association (APHA), American Society for Testing and Materials (ASTM), National Institute for Occupational Safety and Health (NIOSH), and American Industrial Hygiene Association (AIHA).

The Great Seal of California ELAP
Environmental Laboratory Accreditation Program (ELAP) Certification

logo-rtc-corpRTC Proficiency Certified

California Better Business Bureau California Better Business Bureau A Plus
California Laboratory Services has earned an A+ rating from the Better Business Bureau (on a scale of A+ to F)

State Water Resources Control Board Certification Number Rancho Cordova Location: 1233

California Small Business Number: 2916