1. What are the pollutants your group will be adding to the clean water? 2. When you have added the pollutants, what do you think will happen to the water? 3. What is the TDS value for your clean water? What is the pH value for your clean water?
Have the students make a poster to raise awareness about the issue of sewage. Split them into groups of 2 or 3 and have them pick three pieces of information that really stood out for them and that they felt other people should be aware of.