2. What is a Water Shed? The region draining into a river.

3. What is a Water Shed? http://www.youtube.com/watch?v=f63pwrMXkV4 – 1:10 min. http://www.youtube.com/watch?v=f63pwrMXkV4

4. Little Miami Water Shed – 1,758 square miles – flows through all or part of 9 counties – Impairments in the Little Miami River are Ecoli & PCBs.

5. PCB Info - optional http://www.epa.gov/epawaste/hazard/tsd/pcbs/about. htm http://www.epa.gov/epawaste/hazard/tsd/pcbs/about. htm

6. Another picture of the L.M. Watershed

7. Water Pollution Videos http://www.youtube.com/watch?v=V_pzxeHhkcQ – 3 min

8. LONG List of Drinking Water Contaminants! http://water.epa.gov/drink/contaminants/index.cfm

9. One part per million, or one milligram per liter (mg/l), would be equal to putting ONE drop of water from an eyedropper into 10 gallons of water.

10. Parts/Billion = putting 1 drop of water in a 10,000 gallon swimming pool.

11. Parts/trillion = putting 1 drop of water in an Olympic size swimming pool.

12. Water Treatment Process

13. Coagulation Removes dirt and other particles suspended in water. Alum and other chemicals are added to water to form tiny sticky particles called "floc" which attract the dirt particles. The combined weight of the dirt and the alum (floc) become heavy enough to sink to the bottom during sedimentation.

14. Water Treatment Process

15. Sedimentation The heavy particles (floc) settle to the bottom and the clear water moves to filtration.

16. Water Treatment Process

17. Filtration The water passes through filters, some made of layers of sand, gravel, and charcoal that help remove even smaller particles.

18. Water Treatment Process

19. Disinfection A small amount of chlorine is added or some other disinfection method is used to kill any bacteria or microorganisms that may be in the water.

20. Water Treatment Process

21. Storage Water is placed in a closed tank or reservoir in order for disinfection to take place. The water then flows through pipes to homes and businesses in the community.

22. Tour of a Waste Water Treatment Plant – 10 min http://www.youtube.com/watch?v=vC42YTIjxpM

23. Proctor and Gamble Water Filtration Devices http://www.youtube.com/watch?v=p3e-52MkXbM – http://www.youtube.com/watch?v=p3e-52MkXbM 1 min http://www.youtube.com/watch?v=_TnwRNpMH1U – http://www.youtube.com/watch?v=_TnwRNpMH1U 3 min Watch this one first!

24. Water Treatment Video http://www.youtube.com/watch?v=tuYB8nMFxQA

25. Water Filtration Challenge!