different between unclean vs contaminated

English

From Middle English unclene, from Old English uncl?ne, equivalent to un- +? clean.

unclean (comparative uncleaner, superlative uncleanest)

contaminated

contaminated (comparative more contaminated, superlative most contaminated)

adulterated; impure
made unfit for use by the introduction of unwholesome or undesirable elements.
- 2004, Phil Croucher, JAR Professional Pilot Studies (page 12-6)
  A "contaminated" runway has over 25% of its surface area covered with standing water or slush (or loose snow) more than 3mm thick, or compressed snow and ice anywhere along the takeoff run or accelerate-stop surface.

Nouns to which "contaminated" is often applied: food, meat, fish, milk, water, groundwater, land, soil, sediment, site, property, air, product, material.

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