unpollutable

English

Etymology

From un- +‎ pollutable.

Adjective

unpollutable (not comparable)

  1. Not pollutable; resistant to pollution.
    • 1908 January 4, John Muir, “The Hetch Hetchy Valley”, in Sierra Club Bulletin[1], volume VI, number 4:
      "Hetch Hetchy water is the purest, wholly unpolluted, and forever unpollutable."