.15 Certification of Out-of-State Water Quality Laboratories.

A. An out-of-State water quality laboratory may be certified to perform drinking water analyses pursuant to Environment Article, Title 9, Subtitle 10, Annotated Code of Maryland, provided it is certified by the U.S. Environmental Protection Agency, TNI, or the state in which it is located, if certification criteria are at least as stringent as the requirements of this chapter. Proof of this certification shall be provided to the Department by the out-of-State water quality laboratory.

B. An out-of-State water quality laboratory shall submit acceptable proficiency test results for each certified parameter and method.