Definitions
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(1) Contaminant
The term “contaminant” means any physical, chemical, biological, or radiological substance or matter in water.
(2) Contaminant of emerging concern; emerging contaminantThe terms “contaminant of emerging concern” and “emerging contaminant” mean a contaminant—
(A)
for which the Administrator has not promulgated a national primary drinking water regulation; and
(B)
that may have an adverse effect on the health of individuals.