1. SHANNON WILLAERT IDT 510 ASSIGNMENT #4 Water to Drink NEXT 

2. I will be able to… Describe the factors that affect water quality. Explain why water is often treated before people drink it. List and describe the steps of the water treatment process. Explain what happens to wastewater in most communities. NEXT 

3. Water Quality The Environmental Protection Agency (EPA) develops water-quality standards. The standards help to ensure that water is safe to drink. NEXT 

4. Selected Water-Quality Standards NEXT  SubstanceLimit Arsenic0.01 parts per million (ppm) Carbon tetrachloride0.005 ppm Copper1.3 ppm Cyanide0.2 ppm Lead0.015 ppm Coliform countNo more than 5% of samples taken in a month can be positive. pH6.5 – 8.5

5. Standards Explained pH – measures how acidic or basic the water is. Acidic water can cause problems by dissolving lead from pipes it passes through. Hardness – the combined level of calcium and magnesium in water. Hard water does not easily form suds and can lead to pipe-clogging deposits. Coliform count – measures the amount of E. coli bacteria. Their presence of E. coli in water shows that it contains human or animal wastes. NEXT 

6. Who determines quality standards? B. EPA (Environmental Protection Agency) C. WHO (World Health Organization) D. UND (University of North Dakota) A. CDC (Center for Disease Control)

7. CORRECT! The EPA is responsible for deciding if water is safe to drink as well as creating standards for ensuring good water quality. NEXT 

8. Sorry, it is not the CDC. The CDC is responsible for monitoring the spread of disease around the world.  Go back and try again.

9. Sorry, it is not the WHO. The World Health Organization is responsible for monitoring disease outbreaks around the world.  Go back and try again.

10. Sorry, it is not UND. UND is responsible for educating students.  Go back and try again.

11. Why is water with a high coliform count not good to drink? A. The water contains acid and may contain lead. C. The water contains bacteria from human and animal wastes and may cause disease. B. The water contains calcium and is hard. D. The water is OK to drink with a high coliform count; water with a low coliform count is unsafe.

12. Sorry, you are incorrect. Coliform count does not have to do with acidity or lead. Acidity has to do with pH.  Go back and try again.

13. Sorry, you are incorrect. Hardness deals with the amount of calcium and magnesium in water. Coliform count is not about hardness of water.  Go back and try again.

14. CORRECT! Coliform count is how much bacteria is in water. The more bacteria, the more likely one is to get a disease. You want the coliform count of the water you drink to be low so that you do not get sick when you drink water. NEXT 

15. Sorry, you are incorrect. Water with a low coliform count is actually safe to drink. This means there is a very small number of bacteria in the water.  Go back and try again.

16. Treating Drinking Water Water will go through the following steps in a water treatment plant.  1. First Filtration (large debris is removed)  2. Coagulation (alum is added to form sticky flocs)  3. Settling Basin (flocs sink into the settling basin)  4. Second Filtration (small debris is removed)  5. Chlorination (chlorine kills remaining organisms)  6. Aeration (air added to reduce odors)  7. Additional Treatments (water may be softened, fluoride added) NEXT 

17. NEXT 

18. The Water Treatment Process https://www.youtube.com/watch?v=tuYB8nMFxQA NEXT 

19. Water Distribution Once water is treated, it is pumped to homes through a network of pipes. Water towers may also be used to store water until it is needed. NEXT 

20. What does aeration do to the water during the treatment process? A. Aeration removes large debris. B. Aeration kills tiny organisms. C. Aeration makes the water smell better. D. Aeration softens the water.

21. Sorry, you are incorrect. Filtration removes large debris from water.  Go back and try again.

22. Sorry, you are incorrect. Chlorination kills tiny organisms in water.  Go back and try again.

23. CORRECT! Aeration makes water smell and taste better. NEXT 

24. Sorry, you are incorrect. Aeration does not soften water.  Go back and try again.

25. How does water get from a treatment facility to a home? A. Water infiltrates the ground. B. Water is pumped to homes through pipes. C. Water is stored in a water tower. D. Water is shipped from the treatment center to your home.

26. Sorry, you are incorrect. Water that infiltrates the ground is now called groundwater. Groundwater may get to your house through a well, but this water has not been through a treatment facility.  Go back and try again.

27. CORRECT! Water that has been treated at a treatment facility is pumped through underground pipes to get to your house. NEXT 

28. Sorry, you are incorrect. If water is stored in a water tower, than it cannot reach your house. The water must be pumped from the water tower to get to your house.  Go back and try again.

29. Sorry, you are incorrect. Water is not shipped to your house. This would be take a lot of time, cost a lot of money, and be harmful to the environment.  Go back and try again.

30. Treating Wastewater You create wastewater when you take a shower, flush the toilet, or wash a load of laundry. Wastewater and the different kinds of waste in it are called sewage. Communities deal with sewage through wastewater treatment plants or septic systems. NEXT 

31. Wastewater Treatment Plant Wastewater flows from homes to sanitary sewers. These sewers carry water to wastewater treatment plants. NEXT 

32. Sewage Treatment Process https://www.youtube.com/watch?v=gxgpK1EUZns NEXT 

33. Septic System A septic system contains a septic tank which is an underground tank containing bacteria that treat wastewater as it passes through. Occasionally a septic tank must be pumped so that materials that do not break down do not fill the tank. Water filters from the tank into a septic field and over time, wastes break down naturally in the soil. NEXT 

34. Diagram of a Septic System NEXT 

35. How a Septic System Works http://www.gbra.org/septic.swf NEXT 

36. What happens to water after it leaves a septic tank? A. Water enters a septic field and wastes gradually break down there. B. Water enters a second holding tank and remains there until it is pumped out. C. Water stays in the septic tank. D. Water is pumped into a network of pipes to be treated by the sewage treatment plant.

37. CORRECT! Waste water that has entered the septic field is underground and begins break down. NEXT 

38. Sorry, you are incorrect. Water goes directly from a septic tank to a septic field.  Go back and try again.

39. Sorry, you are incorrect. Though some water will stay in a septic tank, most water will go to the septic field after the septic tank.  Go back and try again.

40. Sorry, you are incorrect. Water from a septic tank does not get pumped to a waste water treatment facility.  Go back and try again.

41. You should now be able to… Describe the factors that affect water quality. Explain why water is often treated before people drink it. List and describe the steps of the water treatment process. Explain what happens to wastewater in most communities. NEXT 

42. You should be able to define and use the following words: Water quality EPA pH Hardness Coliform count Filtration Coagulation Chlorination Aeration Water treatment Waste water Sewage Septic tank Septic field Septic system NEXT 

43. THE END!