Environmental
A North Dakota property's drinking water well shows elevated nitrate levels. A primary source of nitrate contamination in rural North Dakota groundwater is:
AOil and gas operations exclusively
BAgricultural fertilizers and septic system effluent leaching through the soil✓ Correct
CRoad salt applications
DNaturally occurring minerals only
Explanation
Elevated nitrate levels in North Dakota groundwater are most commonly associated with agricultural fertilizer applications and septic system effluent leaching through sandy or thin soils into shallow aquifers.
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