The EAL has been promoting the accreditation of environmental analysis laboratories since 1987. With a view to increasing the transparency of the accreditation procedure, the EAL published the "Guideline for the Authorization and Management of Environmental Analysis Laboratories" in 1990. This guideline has subsequently been revised and amended several times. In November 19, 1997 the latest modified guideline was published as the "Management regulations of Environmental Analysis Laboratories". Afterward, a series of basic criteria for an environmental analysis laboratory's QA system has also been formulated according to ISO/IEC 17025 international standards, both to promote the development of QA systems and also to ensure public confidence in test data quality.

Nationally, the contribution that accredited laboratories make to environmental analysis is considerable. There are currently 90 accredited laboratories with more than 1,700 employees, who make up 85% of the total test lab employees in the R.O.C. In terms of the number of analyzed samples, accredited laboratories now also account for 85 % of all tested samples. 

The EAL also authorizes accredited laboratories to carry out motor vehicle emission and noise tests in accordance with the EPA's policy. Vehicle manufacturers are requested to carry out a quality program and submit monthly test reports to the EPA. The EAL is in charge of assisting the accredited laboratories in upgrading their test quality and complying with the ISO/IEC 17025. In addition, the EAL has developed and employed a standard motorcycle for improving test quality. Untill March of 2010,There are currently 17 laboratories authorized for vehicle emission testing. 

                                

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