Exam 18: Water Pollution

Cultural eutrophication results from

Which of the following are inorganic toxic substances sometimes found in local water supplies?

Wetland protection is one of the most controversial provisions of the ___________ because opponents believe that the legislation is _____________.

Best practical technology (BPT) is legally required for all

Aquifers are especially susceptible to contamination

Pollution of water in large aquifers is essentially irreversible in the short term (decades).

The type of water pollutant that most commonly threatens human health is/are ______.

____________ is to a point source of water pollution as _____________ is to a nonpoint source of water pollution.

The greatest remaining need in rectifying remaining water pollution problems in the U.S. and Canada is solving the point source discharge problem.

Which of the following would NOT help to improve water quality?

In 1998, a change in the approach to water quality was initiated by _________ with an emphasis on _________.

Examples of point sources of water pollution include

Explain the connections between oxygen sag and biological oxygen demand (BOD). Use a drawing in your explanation and use appropriate labels.

The principal source of infectious waste material in water is

An oxygen sag occurs most often

Dioxins, pesticides, and polychlorinated biphenyls are all types of

In the diagram, which of the following units would probably be used to label the numbers on the horizontal (X) axis?

Primary sewage treatment involves

The following statements explain why contamination of aquifers is dangerous. Which of the statements is false?

__________ should never be allowed down a drain when a septic tank and drain field system is being used for sewage disposal.