1. Build a Water Filter How do economics effect the quality of the filter that you build?? Global water treatment issues

2. What to do: You will be assigned to a group Each group will receive: – A sample of water & a score sheet (to complete) – Instructions on building a water filter & some money 1 Rural community - $50 2 Urban community - $250 3 Urban community - $250 4 Homeowners - $60 5 Aboriginal community - $50 6 Classroom community - $100

3. What to do – con’t: Read through your “community” sheet Build the filter for your community & filter the water sample for your community Measure TDS & pH for your water sample before and after filtering Be ready to present your filter and explain the quality of the resulting filtered water

4. Water Pollution Chart (score sheet ) Community name: ______________________ Population: ____________________________ Water Source: _________________________ Observe the following:Description: Pollutants visible in sample Possible pollutants in sample TDS before adding bleach pH before adding bleach TDS after adding bleach pH after adding bleach TDS after filtering pH after filtering