unpolluted
1. [ adjective ] free from admixture with noxious elements; clean
Synonyms: uncontaminated
Examples:

"unpolluted streams" "a contaminated lake"

Related terms: pure
Similar spelling:   unbolted
  unfolded
  unfilled
  unfelled
  unobligated
  unpolished
  unpillared
  unifoliate
  unfolding