Environmental

NH homeowners with private wells are most concerned about naturally occurring arsenic because:

AArsenic is only found in industrial areas of NH
BBedrock geology in NH releases arsenic into groundwater, posing health risks particularly in southern and central NH✓ Correct
CArsenic contamination only affects public water supplies
DNH DES has no testing requirements for private wells

Explanation

New Hampshire's granite bedrock geology naturally releases arsenic into groundwater. Many private wells in southern and central NH have arsenic levels exceeding EPA's maximum contaminant level of 10 ppb.

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