§ 100872 Laboratory Proficiency Testing Requirements

Health and Safety Code·California

AI SummaryVerified

This law says labs that are certified must successfully do proficiency tests at least once a year, and if they fail those tests they have to stop testing that kind of sample.

Key Takeaways

•Certified labs must do at least one successful proficiency test each year for each test they are certified to do.
•The test methods must be approved by the U.S. government or the state board.
•If a lab fails, it must stop doing the tests it failed until it meets the requirements.

Example

A lab that checks drinking water for contaminants runs a government‑approved proficiency test every year. If the lab fails the test, it must stop testing water for those contaminants until it passes again.

The lab follows the rule by testing once a year. When it fails, it stops the water testing work as required.

AI-generated — May contain errors. Not legal advice. Always verify source.

Official Source

View on CA.gov

§ 100872 Laboratory Proficiency Testing Requirements

(a) An ELAP certified laboratory shall successfully analyze proficiency testing samples for those fields of testing for which they are certified, not less than once a year, where applicable. Proficiency testing procedures shall be approved by the United States government or by the state board. (b) A TNI accredited laboratory shall participate in, and meet the success rate for, proficiency testing studies as required in the TNI standards. (c) The ELAP certified or TNI accredited laboratory shall discontinue the analyses of samples for the fields of testing or subgroups which have been suspended for failure to comply with the proficiency testing requirements in this section. (Amended by Stats. 2017, Ch. 327, Sec. 14. (AB 1438) Effective January 1, 2018.)

Last verified: January 11, 2026

Key Terms

ELAP certified laboratory TNI accredited laboratory proficiency testing fields of testing

References

Official text at leginfo.legislature.ca.gov
California Legislature. Health and Safety Code. Section 100872.

§ 100872 Laboratory Proficiency Testing Requirements

Health and Safety Code·California

AI SummaryVerified

§ 100872 Laboratory Proficiency Testing Requirements

This law says labs that are certified must successfully do proficiency tests at least once a year, and if they fail those tests they have to stop testing that kind of sample.

Key Takeaways

•Certified labs must do at least one successful proficiency test each year for each test they are certified to do.
•The test methods must be approved by the U.S. government or the state board.
•If a lab fails, it must stop doing the tests it failed until it meets the requirements.

Example

The lab follows the rule by testing once a year. When it fails, it stops the water testing work as required.

AI-generated — May contain errors. Not legal advice. Always verify source.

Official Source

View on CA.gov

§ 100872 Laboratory Proficiency Testing Requirements

Last verified: January 11, 2026

Key Terms

ELAP certified laboratory TNI accredited laboratory proficiency testing fields of testing

References

Official text at leginfo.legislature.ca.gov
California Legislature. Health and Safety Code. Section 100872.

Key Takeaways

Example

Key Terms

Related Statutes

References

Key Takeaways

Example

Key Terms

Related Statutes

References