unpollutable

Not pollutable; resistant to pollution.

Adjective

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

Origin

From un- + pollutable.