Antonyms of adj unpolluted

1 sense of unpolluted

Sense 1
uncontaminated, unpolluted -- (free from admixture with noxious elements; clean; "unpolluted streams"; "a contaminated lake")

INDIRECT (VIA pure) -> impure -- (combined with extraneous elements)

Similarity of adj unpolluted

1 sense of unpolluted

Sense 1
uncontaminated, unpolluted -- (free from admixture with noxious elements; clean; "unpolluted streams"; "a contaminated lake")
       => pure (vs. impure) -- (free of extraneous elements of any kind; "pure air and water"; "pure gold"; "pure primary colors"; "the violin's pure and lovely song"; "pure tones"; "pure oxygen")