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Future of Residential Water Use: Trends, Conservation, and Management

Explore urban water demand trends and the importance of water conservation for combating shortages and climate change. Learn about historical and future droughts, demand management strategies, and the role of new technologies in sustainable water use. Discover how efficient water practices save costs and benefit the environment, with insights on future trends in residential water management.

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Future of Residential Water Use: Trends, Conservation, and Management

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  1. Urban Water Demand Trends Conservation and the Future of Residential Water Use Peter Mayer, P.E. peter.mayer@waterdm.com www.a4we.org www.waterdm.com www.incentware.com

  2. Water Demand Management: Why? • Water shortages • Expensive to develop new supplies • Climate change

  3. Demand Management = Serious Business

  4. Drought @2050 vs Notorious Recent Historical Droughts PDSI = Palmer Drought Severity Index PDSI was developed by Wayne Palmer in the 1960s and uses temperature and rainfall information in a formula to determine dryness. 2040-2060 Source: Dr. Martin Hoerling, NOAA Earth System Research Laboratory

  5. Greeley Colorado Historic Demand

  6. Utilities are Asking: Where did the demand go? • In 2008 a typical household used ~ 12,000 gallons less than in 1978 (Coomes, P. et. al. 2010). • Significant demand reductions were observed prior to recession. City of Westminster, CO average annual household water use, 2000 – 2010, with trend line

  7. Seattle Public Utilities - 1990

  8. Forecast Without Conservation

  9. Firm Yield in 2013

  10. Forecast With Conservation

  11. 2013

  12. A brief history of demand forecasting in Seattle

  13. Seattle Saved $725 million PV Cost of New Supply $800 Million PV Cost of Conservation: $ 75 Million _______________________________________________________________ NPV : $725 Million

  14. Avg. Annual Use Per SF Home (kgal) Source: Mayer, P. et. al. 2013. Residential End Uses of Water Update. AWWA - ACE, Denver, CO.

  15. 1999 REUWS vs. 2014 REUWSgallons per household per day

  16. 2014 REUWS Update

  17. Homes Meeting Efficiency CriteriaToilet < 2 gal., Clothes washer <30 gal.

  18. How much more conservation? • A lot. • We’re almost…half way there! • New technology • Outdoor efficiency • WaterSense • Leak detection • Advanced metering • Conservation-oriented rates • Customer engagement through data and information

  19. Future Trends • Technological change • Behavioral change • More intense and frequent drought • Water demand management at the retail level

  20. Thank You Peter Mayer, P.E. peter.mayer@waterdm.com

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