Quality of a River - Water Quality
Dissolved oxygen story (pg
4 of 4)
Runoff of fertilizer, agricultural waste, and
other nitrogen-rich organics-primarily from the
ditched and tiled farm fields of the upper
Midwest-have created an oxygen-starved plume known
as the "Dead Zone" covering from 2,000 to more than
6,000 square miles in the Gulf of Mexico.
To learn about the large scale consequences of
this ecological suffocation, read the story in
From Farmer to
Shrimper: The Dead Zone.