Since the Clean Water Act of 1972, the quantities of nitrate and phosphate entering surface waters have
A) decreased significantly for both point and nonpoint sources.
B) have decreased for nonpoint sources but not point sources.
C) have decreased for point sources but not nonpoint sources.
D) essentially remained the same.

Question

Quizplus · Accepted Answer

The Clean Water Act of 1972 has been effective in reducing pollution from point sources, such as factories and wastewater treatment plants, due to regulations and enforcement mechanisms. However, it has been less effective in controlling nonpoint source pollution, such as agricultural runoff, which continues to contribute significant amounts of nitrate and phosphate to surface waters.

Since the Clean Water Act of 1972, the Quantities of Nitrate