1. What is the difference between point and non-point sources of pollution? Which type is harder to control?

2. Water quality is measured by assessing which:

Biological factors

Chemical factors

Physical factors

3. Know how the following impact water quality:

            Nutrients and OM:  the number one pollution problem for lakes and estuaries.

What does Biological Oxygen Demand (BOD) measure? What wastes cause a high BOD?

            Pathogens: What types of diseases are water borne?

What does the coliform bacteria test measure?

            Toxic chemicals:

What two types of chemicals are of particular concern because they are toxic in small amounts, and don’t degrade readily, bioaccumulate and biomagnify?

            Sediments:  the number one problem for streams and rivers.

            Heat and cold:

4. In what way is groundwater pollution a more serious problem than surface water pollution?

5. Can polluted groundwater be treated? How?

6. What are the three specific goals of modern wastewater treatment?

7. What types of materials are typically NOT removed during treatment?