Environmental

A Kentucky property owner discovers that their well water tests positive for high arsenic levels. The most likely source in areas with coal mining history is:

AAgricultural runoff only
BNatural geological sources or mining-related contamination✓ Correct
CMunicipal water supply system leaks
DHVAC system corrosion

Explanation

Elevated arsenic in well water can come from natural geological sources (arsenic in rock and soil) or from mining-related contamination. In Kentucky's coal country, both sources are possible.

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