1. Water Pollution

2. Water Pollution Occurs In Developed Countries In developing countries, water pollution is caused mainly from dumping raw sewage into the water supply. In developed countries, water pollution comes mainly from 3 sources – Municipal pollution – Industrial pollution – Agricultural pollution

3. Municipal Pollution Water pollution from cities and towns comes from – Improperly treated sewage – Septic systems – Yard runoff – Storm drains

4. The San Francisco Bay The San Francisco Bay has had a problem with pollution for many years.

5. Industrial Pollution Factories and hospitals create pollutants that contaminate waterways. – Radioactive waste – Oils, toxic chemicals and heavy metals – Heated water

6. Agricultural Pollution Livestock waste – carry harmful disease Pesticides – toxic to fish Fertilizers – cause algae to grow quickly and then die and decompose. This decreases dissolved oxygen in the waterway and fish die.

7. Listen to the following to answer the questions https://www.youtube.com/watch ?v=phmN-IpR3xw What is an example of point source pollution? What is our biggest threat to clean water, at least in Indiana? What are the common pollutants carried in non-source pollution? Why does non-point source pollution have the greatest impact on water quality? How does non-point source pollution end up in our water sources? What are some of the common causes of non-point source pollution?