Exam 14: Water Pollution

If MTBE (methyl tert-butyl ether) has such an impact on groundwater, why is it added to gasoline?

A septic tank performs the equivalent of ________ treatment in the municipal wastewater treatment system scheme.

Thermal pollution is harmful to some organisms, but actually helps others survive.

Septic tank systems can contribute nitrate contamination to groundwater.

How did Hurricane Floyd contribute to dramatic water pollution in North Carolina?

Large pig farms in North Carolina caused no pollution problems prior to the arrival of Hurricane Floyd.

Wetlands are especially efficient at reducing ________ levels in wastewater.

Acid mine drainage results from the oxidation and dissolution of coal and ________ ores.

Eutrophication can occur in the absence of human influences.

________ and ________ are the two drinking water contaminants thought to pose an immediate health threat.

The level of decaying organic matter in water is indicated by what measure?

What happened to the Cuyahoga River in Cleveland in 1969?

Biochemical oxygen demand reflects the amount of organic matter in water bodies.

A cone of ________ is formed in saltwater as it intrudes fresh groundwater near a pumping well.

In the mid-1990s, Congress passed revisions to the Clean Water Act with broad public support.

The biomagnification of mercury occurs as mercury moves through

Groundwater pollution is better alleviated by prevention than by treatment.

Biomagnification is an especially important process in the concentration of ________ to toxic levels.

Nitrogen and ________ are usually responsible for cultural eutrophication.

Wastewater renovation relies on what processes to purify water?