1. Ch 11-3 Water Pollution

2. What is it? Anything that degrades water quality Anything that negatively affect organisms What causes it? Almost every way we use water pollutes Industrialization and rapid population growth

3. Where does it come from? Point-Source Pollution – Can trace pollution to a source – Ex: leaking tanker, factory, sewage pipe

4. Where does it come from? Point-Source Pollution Non-Point Source Pollution – Comes from many different sources – Difficult to enforce laws – Ex: Acid rain, runoff from streets/farms/lawns

6. Types of Pollutants (6) 1.Pathogens—cause disease

7. Types of Pollutants (6) 1.Pathogens—cause disease 2.Organic Matter—animal and plant remains

8. Types of Pollutants (6) 1.Pathogens—cause disease 2.Organic Matter—animal and plant remains 3.Organic Chemicals— pesticides/fertilizer/gasoline/oil/plastics 4.Inorganic Chemicals—salts/acids/bases 5.Heavy metals—lead/mercury/arsenic 6.Physical Items—heat and trash

9. Wastewater Water that leaves a home or industry Treated similar to water entering homes Things that don’t decompose form “sludge” – Harmful needs to be stored, burned, or used

10. Common Pollution Artificial Eutrophication – Read page 288 – Too many ________ can cause harm – The process of ________ uses the _____ – This natural process increases when ???

11. Common Pollution Groundwater Pollution – Leaky Underground Storage Tanks (LUST) are large source of pollution – Tough to clean up because pollutants stick to soil

12. Common Pollution Ocean Pollution – Dumping from ships – 85% of it comes from land activities – Exxon Valdez most famous oil spill

13. Cleaning up EPA regulates pollution through many laws: – Clean Water Act (1972) banned dumping of pollutants – Other laws regulate drinking water, oil tankers, sewage, etc.