Presentation on theme: "Water Pollution. Water Pollution Occurs In Developed Countries In developing countries, water pollution is caused mainly from dumping raw sewage into."— Presentation transcript:
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
Municipal Pollution Water pollution from cities and towns comes from – Improperly treated sewage – Septic systems – Yard runoff – Storm drains
The San Francisco Bay The San Francisco Bay has had a problem with pollution for many years.
Industrial Pollution Factories and hospitals create pollutants that contaminate waterways. – Radioactive waste – Oils, toxic chemicals and heavy metals – Heated water
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.
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?