In this subtitle the following words have the meanings indicated. “Certification” means certification by the Department under this subtitle. “Person” includes any state, county, municipal corporation, federal agency, or special taxing area. “Public drinking water system” has the meaning stated in the federal Safe Drinking Water Act for “public water system”. “Water quality laboratory” means any person who, by any method, examines a public drinking water system: To determine whether it complies with the federal Safe Drinking Water Act or State standards for public drinking water; or To produce laboratory information for enforcement of the federal Safe Drinking Water Act or State standards for public drinking water.