An example of a non-point solution is 

• waste water from leaking pipe
• fertilizer runoff from lawns

An example of point source pollution is

• trash floating in the ocean
• oil spilling from a supertanker

For what types of water does the Clean Water Act relate to?

• surface waters
• ocean waters

A body of water that has high turbidity is ...

• cloudy
• clear

Which of the following are indicators of healthy water systems?

• high nitrates, high pH, and low temperatures
• low temperatures, high dissolved oxygen, and neutral pH

What is the possible effect of high nitrate level in water systems?

• algal bloom
• fewer algae

Which best determines the health of a lake used as a source of freshwater?

• its temperature and pH
• its location and depth

If a body of water has high turbidity levels, what can most likely be concluded?

• It is unsafe to drink
• It contains a lot of chemicals

Which describes a nonpoint source of pollution?

• runoff from a road into a nearby stream
• liquid fertilizer flowing

Which is most likely indicated by a sudden increase in turbidity in water?

• high biodiversity
• rapid increase in the amount of algae