Question

Both nonpoint source pollution and point source pollution can impact water quality in streams, rivers, and lakes. Despite significant improvements to water quality from implementation of Clean Water Act regulations, many waters across the United States do not meet water quality standards. What is the most likely cause for the continued impairment of water quality?
Much of the pollution today is from pollutants being exposed to rainwater, and runoff is reaching the water.

The chemical industry is producing and discharging record amounts of chemicals into rivers and streams.

Environmental enforcement has been reduced, and more pollution is being discharged into rivers and streams.

Water quality standards have become more lenient, allowing more pollutants to be discharged into the water.

Answer 1

The most likely cause for the continued impairment of water quality  is much of the pollution today is from pollutants being exposed to rainwater, and runoff is reaching the water.

What is the leading cause of water quality problems?

The most common kind of Water Contamination that is seen in the US and the world is agriculture and it is said to be the leading cause of water degradation.

In the United States, agricultural pollution is said to be at the highest peak and as such, the most likely cause for the continued impairment of water quality  is much of the pollution today is from pollutants being exposed to rainwater, and runoff is reaching the water.

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