Facts and data regarding water usage. September 12, 2011.

1. Greywater, green jobs, and ecological landscaping Laura Allen Greywater Action

2. How many gallons of water per day does the World Health Organization recommend each person have to meet their basic health and sanitation needs? 13 gallons

4. How many people worldwide do not have any water within a 15-minute walk of their homes? One billion

5. Who said, "Whiskey is for drinking; water is for fighting over"? Mark Twain

6. How many billions of gallons of raw or partially treated sewage flows into our waterways each year? 850 billion gallons

8. Per capita daily water consumption (gallons per day)‏

9. Where does our water come from?

12. Where does it go?

15. from Rainwater Harvesting for Drylands

19. Millions of gallons per day of savings for So. Cal (MGD)‏ Washers Showers and washers Showers, washers, sinks 100% 10% 1% 383 672 964 38 67 96 4 7 10 From UCLA's report: Graywater- A Potential Source of Water Offsets need for desal plant

25. Mulch basin Image from "Create an Oasis with Greywater" by Art Ludwig

27. Laundry to landscape- permit exempt ( $100-200 materials only, $700-2,000 complete installation)‏

29. Bury and stake tubing Discharge under 2" into mulch ½ inch lines irrigate off main 1" line

30. Code compliant- GW discharged under mulch shield Not code compliant

32. System details: Materials- $150 Machine- 15 gallons/load, 3 loads a week. to 6 locations Each tree gets 9 gallons a week Labeled 3-way valve Mulch basins around trees, GW discharged under 2", onto mulch. Laundry irrigates 6 fruit trees around yard. City water irrigates vegi beds .

34. Image from "Create an Oasis with Greywater" by Art Ludwig Shower and Sink Systems

35. Installing a 3-way valve (requires a permit)‏ Sewer Greywater 1. 2. 3. Greywater enters

37. Future tree Greywater in Flow splitter divides flow in half

38. Flow splitter divides flow in half Branched drain system from a high use sink: divided to 4 outlets

39. Greywater outlet, irrigates drip line of tree. Mulch basin will be filled to top when complete. Image from Create an Oasis with Greywater

41. High tech- drip irrigation RP Backflow preventer Rewater system

43. Composting Toilets

44. Earthen Closet

46. Urine reuse in Sweden Image: Sustainable Sanitation

47. Sewerless public bathroom Clivus Multrum composting toilets Foam flush toilets inside Subsurface greywater irrigation