How do nitrates get into the surface water

1 answer:

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Natural levels of nitrate in Minnesota groundwater are usually quite low (less than 1 milligram per liter [mg/L] of nitrate-nitrogen). However, where sources of nitrate such as fertilizers, animal wastes, or human sewage are concentrated near the ground surface, nitrate may seep down and contaminate the groundwater. Elevated nitrate levels in groundwater are often caused by run-off from barnyards or feedlots, excessive use of fertilizers, or septic systems.

Wells most vulnerable to nitrate contamination include shallow wells, dug wells with casing which is not watertight, and wells with damaged, leaking casing or fittings.

Nitrate contamination of a well is often regarded as a first sign of deteriorating groundwater quality.

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describe one piece of evidence represented by the contour line on the map that indicates the north side of chimney bluffs is ste

zhannawk [14.2K]

Incomplete question. Attached is the image of the map below.

<u>Explanation:</u>

From the map, we could notice the contour lines around the Chimney Bluff areas are closely packed together. In other words, the spacing between the contour lines is narrower than those found in other locations.

This assertion is accurate because it is a standard practice in many maps to indicate the steepness of an area by having the contour lines in close proximity.