1. Pollution
In water,
of course!
Topic 8
A – E

2. Review What is pollution? Examples of water pollutants: Point-source:
Non-point source:

3. Types of Pollution

4. Types of Pollution

5. Types of Pollution

7. Effluent as Pollution
Effluent is an out flowing of water (treated or untreated) into the environment
In this case, effluent is out flowing from sewage or industrial waste
In some countries this can even be raw sewage
Companies may pay fees or taxes in order to discharge in the environment or to a sewer = Effluent Tax

9. Aquatic Thermal Pollution
Human activities should not change water temperatures beyond natural seasonal fluctuations.
Caused by large inputs of heated water from a factory using a lake or slow-moving river to cool equipment.
How else can rivers/streams get overheated?
Can cause “fish kills” especially in smaller ponds. Why?

10. Acidification
Changes in pH values in aquatic locations has an effect on the organisms living at that location.
What would change the pH of a body of water?
Since the majority of aquatic life has adapted to living in certain pH levels, large changes may cause these organisms to die.

11. Aquatic pH Aquatic bacteria can live in a pH level between 2 and 13
Plants between 6 and 13
Carp, catfish, bass, bluegill, snails, clams, mussels and trout can be found in pH levels between 6 and 9.
How might this affect aquatic health?

12. Organic Pollutants What does organic mean?
Sources of organic pollution:
What will organic pollution increase in a body of water?

13. Inorganic Plant Nutrient Pollution
What is this referring to?
How does it get into a body of water?
What will inorganic plant nutrient pollution increase in a body of water?