Environmental
A Minnesota property near an active agricultural area shows elevated nitrate levels in the well water. This is most likely caused by:
AOld lead pipes in the home
BFertilizer and manure application on nearby cropland✓ Correct
CNatural rock formations dissolving into groundwater
DOld gasoline tanks at a nearby property
Explanation
Elevated nitrates in Minnesota groundwater are most commonly associated with agricultural areas where fertilizers and animal manure are applied. Nitrates can leach through soil into shallow wells. High nitrate levels (above 10 mg/L) are particularly dangerous for infants. Minnesota's agricultural regions, particularly central and southern Minnesota, have significant nitrate contamination issues.
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