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Water education


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

Published in: Education, Technology, Business
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Water education

  1. 1. Greywater, green jobs, and ecological landscaping Laura Allen Greywater Action
  2. 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
  3. 3. How many gallons does the &quot;average&quot; American use in one shower? <ul><ul><li>10 minutes x 2.5 gallon/min= 25 gallons </li></ul></ul>
  4. 4. How many people worldwide do not have any water within a 15-minute walk of their homes? One billion
  5. 5. Who said, &quot;Whiskey is for drinking; water is for fighting over&quot;? Mark Twain
  6. 6. How many billions of gallons of raw or partially treated sewage flows into our waterways each year? 850 billion gallons
  7. 7. % of Total Energy used in CA related to WATER (pumping, heating, cleaning)‏ <ul><li>19% of all electricity </li></ul><ul><li>32% of all natural gas </li></ul>
  8. 8. Per capita daily water consumption (gallons per day)‏
  9. 9. Where does our water come from?
  10. 12. Where does it go?
  11. 13. Sustainable water use practices <ul><li>Harvesting rainwater </li></ul><ul><li>Reusing greywater </li></ul><ul><li>Waterless (composting toilets)‏ </li></ul>
  12. 15. from Rainwater Harvesting for Drylands
  13. 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
  14. 20. Greywater is a resource <ul><li>Saves water </li></ul><ul><li>Saves energy </li></ul><ul><li>Saves money/energy/chemicals at the treatment plant </li></ul><ul><li>Encourages healthy product use </li></ul><ul><li>Connect people to their backyards </li></ul><ul><li>Facilitates local food production </li></ul><ul><li>Protects rivers </li></ul><ul><li>Redefines our relationship to water </li></ul><ul><li>Creates green jobs </li></ul>
  15. 21. Greywater regulations <ul><li>Greywater is sewage Greywater is a resource </li></ul><ul><li>1992- CA writes 1 st greywater code, but treated it as a waste product/sewage (disposal code)‏ </li></ul><ul><li>1992-2009 Almost zero compliance rate- code out of line with intent (irrigation source) and practical nature of greywater </li></ul><ul><li>2009 DHCD (department of Housing and Community Development) writes new code. </li></ul><ul><li>Greywater is starting to be viewed as a resource. </li></ul>
  16. 22. New Code Highlights <ul><li>No permit required for washing machine system (that don't alter household plumbing and following guidelines)‏ </li></ul><ul><li>Discharge depth raised to 2 inches </li></ul><ul><li>Mulch basins allowed for distribution </li></ul><ul><li>Edibles okay- no touching edible portion of crop </li></ul><ul><li>Two tiers of systems &quot;simple&quot; (under 250 gpd) and &quot;complex&quot; (over 250 gpd)‏ </li></ul>
  17. 23. Greywater- From sinks, showers, washing machines (not from toilets or diaper washing)‏ <ul><li>1. Outdoor use- Landscape direct (low tech) ‏ </li></ul><ul><ul><li>No pumps when possible, no filters, not connected to domestic water supply </li></ul></ul><ul><li>2. Outdoor use- For drip irrigation (high tech)‏ </li></ul><ul><ul><li>Needs pumps, filters, connected to domestic water supply, automatically operated </li></ul></ul><ul><li>3. Indoor use </li></ul><ul><ul><li>Needs filtering and disinfectant, needs a pump, automatically operated </li></ul></ul>
  18. 24. Greywater Basics <ul><li>Don’t store it more than 24 hours </li></ul><ul><li>Minimize contact with it </li></ul><ul><li>Infiltrate into mulch- no pooling/ponding </li></ul><ul><li>Best for trees (fruit), shrubs,- can be used for other plants as well </li></ul><ul><li>Use only ecological products (no salt, or boron)‏ </li></ul><ul><li>Know what you put down the drain! </li></ul><ul><li>Don't use if your near a creek </li></ul>
  19. 25. Mulch basin Image from &quot;Create an Oasis with Greywater&quot; by Art Ludwig
  20. 27. Laundry to landscape- permit exempt ( $100-200 materials only, $700-2,000 complete installation)‏
  21. 28. <ul><li>3-way diverter valve </li></ul><ul><li>&quot;auto&quot; vent (prevents a siphon from draining machine as it tries to fill)‏ </li></ul><ul><li>1&quot; pipe </li></ul>Sewer connection Greywater goes to landscape Diverter valve Anti-siphon
  22. 29. Bury and stake tubing Discharge under 2&quot; into mulch ½ inch lines irrigate off main 1&quot; line
  23. 30. Code compliant- GW discharged under mulch shield Not code compliant
  24. 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&quot;, onto mulch. Laundry irrigates 6 fruit trees around yard. City water irrigates vegi beds .
  25. 33. Requirements for permit exempt system from Ch. 16A <ul><li>Do </li></ul><ul><ul><li>Have 3-way valve </li></ul></ul><ul><ul><li>Label system </li></ul></ul><ul><ul><li>Discharge under 2&quot; mulch/rock/cover </li></ul></ul><ul><ul><li>Direct water to irrigation or disposal field </li></ul></ul><ul><ul><li>Minimize contact </li></ul></ul><ul><ul><li>Have a maintenance manual </li></ul></ul><ul><li>Don't </li></ul><ul><ul><li>Have ponding or runoff </li></ul></ul><ul><ul><li>Discharge into neighbor's yard (1.5 ft. setback)‏ </li></ul></ul><ul><ul><li>Connect to potable water supply </li></ul></ul><ul><ul><li>Include a pump </li></ul></ul><ul><ul><li>Violate other codes/laws </li></ul></ul><ul><ul><li>Damage building </li></ul></ul><ul><ul><li>Use diaper wash water or hazardous chemicals (oily rags, etc.) *EDUCATION </li></ul></ul>
  26. 34. Image from &quot;Create an Oasis with Greywater&quot; by Art Ludwig Shower and Sink Systems
  27. 35. Installing a 3-way valve (requires a permit)‏ Sewer Greywater 1. 2. 3. Greywater enters
  28. 36. Branched Drain System- $150-300 materials only, $1,000-3,000 complete installation <ul><li>Flows by gravity </li></ul><ul><li>No moving parts </li></ul><ul><li>No external filters </li></ul><ul><li>Flow is divided using flow splitters </li></ul>¼ flow ¼ flow ¼ flow ½ flow ½ flow ½ flow 1/8 flow Final outlets receive a few gallons each use- system is sized to match plant needs.
  29. 37. Future tree Greywater in Flow splitter divides flow in half
  30. 38. Flow splitter divides flow in half Branched drain system from a high use sink: divided to 4 outlets
  31. 39. Greywater outlet, irrigates drip line of tree. Mulch basin will be filled to top when complete. Image from Create an Oasis with Greywater
  32. 40. Sand filter to drip irrigation <ul><li>High-tech/high-end systems $8,000-10,000 </li></ul>I mage from
  33. 41. High tech- drip irrigation RP Backflow preventer Rewater system
  34. 43. Composting Toilets
  35. 44. Earthen Closet
  36. 46. Urine reuse in Sweden Image: Sustainable Sanitation
  37. 47. Sewerless public bathroom Clivus Multrum composting toilets Foam flush toilets inside Subsurface greywater irrigation
  38. 48. More resources [email_address] <ul><li>Web info </li></ul><ul><ul><ul><li> </li></ul></ul></ul><ul><ul><ul><li> </li></ul></ul></ul><ul><ul><ul><li> </li></ul></ul></ul><ul><li>Books </li></ul><ul><ul><ul><li>Create an Oasis with Greywater by Art Ludwig </li></ul></ul></ul><ul><li>Training </li></ul><ul><ul><ul><li>Greywater Action- </li></ul></ul></ul><ul><ul><ul><li>Green Gardener Program (Ecology Action) </li></ul></ul></ul><ul><li>Installers </li></ul><ul><ul><ul><li> </li></ul></ul></ul>
  39. 49. Laundry to landscape <ul><li>4 Groups </li></ul><ul><li>1 st Match parts used with their name. Say what the part does in the system </li></ul><ul><ul><ul><li>Take turns! </li></ul></ul></ul><ul><li>2 nd Create a mock-up of the inside 3-way valve connection (using the image provided)‏ </li></ul>