Forward-Looking Residential Building Strategies 2016 San Gabriel Valley Water Forum September 20, 2016

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2 Forward-Looking Residential Building Strategies 2016 San Gabriel Valley Water Forum September 20, 2016 A Presentation By: Mark Grey, Ph.D Director of Environmental Affairs and Technical Director Building Industry Association of Southern California Construction Industry Coalition on Water Quality

3 Challenge of Approving New Residential Housing in a Time of Drought: Looking Forward Challenge Approving new housing during drought and face of potential supply cut-backs Demonstrating adequate water supplies exist to support new growth and development Response/Actions BIA-Construction Industry working with Water Contractors for many years in supply portfolio planning Urban water management plans forward looking, 10+ years out. Build-out based New growth and development embedded in supply planning; extremely efficient thru codes and ordinances Demand offset programs are available Recognize variable rate structures encourage conservation

4 Estimated Urban Water Use Slide Data Source: California Single Family Water Use Efficiency Study, Aquacraft, 2011

5 Three Bedroom Home Trend in Annual Indoor Water Use (gallons/home) Fixtures Shower 40,880 29,200 29,200 23,360 Toilets 21,900 15,768 7,008 5,606 Faucets 17,338 17,338 15,257 12,155 Cloths Washer 12,000 12,000 7,650 5,400 Total Indoor Use 92,118 74,306 59,115 46,521 Slide Data Source: Codes and Standards Research Report; California Residential Indoor Water Use, CHF, 2014 Update

6 Why Has Water Use Declined Over Time Within a SF or MF Home? What s Improved Better efficiency of toilets and clothes washers Tiered Rate Structures Future Improvements and Recommendations Leakage from systems Outdoor irrigation overuse Upgrade-on sale ordinances to accelerate adoption and use of high efficiency fixtures and appliances Slide Data Sources: Ca Single Family Water Use Efficiency Study, Aquacraft, 2011; DeOreo 2016

7 Retrofit of Housing Stock Important to Achieving Conservation Goals California has ~7,500,000 Single Family Homes Fixture and Appliance Standards Over Time Year Built # of SF Units Pre 1960s 2,392, s 1,143, s 1,162, s 1,135, s 826, s 889,181 Fixtur e Showe r (gpm) Toilet (gpf) Faucet (gpm) Cloths Washe r (g/cf) Slide Data Source: Codes and Standards Research Report; California Residential Indoor Water Use, CHF, 2014 Update

8 Summary Points: Forward-Looking Residential Building Strategies 1. New residential homes in California are highly water efficient from a conservation standpoint; technology changes and improvements will continue to be integrated 2. The building industry in California has been supportive of and adapting to stringent indoor plumbing efficiency codes, and water efficient landscaping ordinances 3. The largest gains in residential conservation will be met by retrofitting existing homes--across age classes, and detecting leaks/preventing outdoor overuse 4. Look for the building industry to continue to work with water supply agencies to increase water supply reliability and portfolio resiliency on multiple fronts Thank you San Gabriel Valley Water Forum Participants: For More Information Contact: Mark Grey (mgrey@biasc.org;

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10 WATER EFFICIENCY IN NEW HOME CONSTRUCTION 1 0

11 The most practical time to install water conserving devices is when the home is built. -California Single Family Home Water Use Efficiency Study April 20,2011 2

12 The California Water Crisis California is experiencing an extended period of severe to exceptional drought. 1,2 On May 18, the State Water Resources Control Board adopted a statewide water conservation approach that allows water suppliers to replace their prior state-assigned percentage target reduction with a localized Stress Test approach. The Stress Test is based on demonstrating at least a three-year water supply under extended drought conditions. LAKE OROVILLE CALIFORNIA DEPARTMENT OF WATER RESOURCES 3

13 Impact on the Building Industry Drought tolerant landscaping requirements for new construction. 2 Must install drip or micro spray irrigation types for landscaping requiring irrigation. 2 The California Energy Commission (CEC) may establish standards that improve the efficiency of water appliances, including toilets, urinals, and faucets. 2 Water rate increases to deter unnecessary water consumption. 2 Fines for water violations. 2 CHRISTIANE HOLMQUIST LANDSCAPE DESIGN Water rationing. 4 DROUGHT TOLERANT LANDSCAPING RANCHO SANTA FE

14 SoCal Single Family Water Use Average Daily Use by Geographic Region (gphd) Annual Indoor Outdoor Southern CA gphd = gallons per household per day Table 35: Comparison of water use by region California Single Family Home Water Use Efficiency Study 25 Indoor/Outdoor Split (Kgal and %) Outdoor 65% Indoor 35% Indoor Outdoor Figure 34: Relative indoor and outdoor annual water use for study group California Single Family Home Water Use Efficiency Study 25 5

15 CA Single Family Water Use: Indoor Other 2% Leaks 18% Bath 2% Toilet 21% Dish Washer 1% Faucet 19% Shower 20% Clothes Washer 17% Figure 39: End-use pie chart for all sites California Single Family Home Water Use Efficiency Study 22 6

16 INNOVATION IN NEW CONSTRUCTION 1 6

17 WaterSense labeled homes are independently certified to use 20% less water than typical new homes. 16 A Three Part Program The WaterSense New Home Specification has three topic areas: 1. Indoor water use. 2. Outdoor water use. 3. Resident and building management education. 19 A new home must be built by a WaterSense builder partner, certified by an EPA licensed certification provider, and meet all of the applicable criteria in the specification to become a WaterSense labeled new home. 19 8

18 New Homes: Saving Water = Saving Money The average household spends as much as $500 per year on their water and sewer bill and can save about $170 per year by installing waterefficient fixtures and appliances. 14 If homeowners with irrigation systems use a certified irrigation professional to perform regular maintenance, they can reduce irrigation water use by 15 percent or nearly 8,800 gallons of water annually. That's the equal to the amount of water used to take 500 showers. 14 A WaterSense labeled new home can help a family of four reduce their water use by as much as 29,000 gallons annually. 16,20 FOLSOM LAKE CALIFORNIA DEPARTMENT OF WATER RESOURCES 9

19 Indoor Water Technology Smart Home Monitoring Smart Shutoff Valve Leak Detection Push Button Recirculation Pump Thermostatic Shutoff Valve 10

20 Outdoor Water Technology Drought Tolerant Landscape Rain Sensor Municipality Supplied Recycled Water Smart Irrigation Controller Soil Moisture Sensor 11

21 Resources 1 Office of Govenor Edmund G. Brown Jr. Govenor Brown Declares Drought State of Emergency. The January, 2014 order was strengthened in April, 2014: Governor Brown Issues Executive Order to Redouble State Drought Actions. 2 Office of Govenor Edmund G. Brown Jr. Governor Brown Directs First Ever Statewide Mandatory Water Reductions. 3 Public Policy Institute of California. Just the Facts: Water Use in California. July, U.S. Green Building Council Resources. Water Conservation and Water Resource Management in California's Green Buildings: Data, Insights and Opportunity. (p. 6) 5 D.J. Waldie. Drought by the Numbers: Where Does California Water Go? KCET Los Angeles. February 10, Alliance for Water Efficiency. Water and Energy Introduction. Accessed May, California Energy Commission Integreated Energy Policy Report. (pp. 139, 143) 12 EPA WaterSense. WaterSense Labeled Toilets. February, EPA WaterSense. WaterSense Labeled Irrigation Controllers. February, EPA WaterSense. Statistics & Facts. Accessed May, EPA WaterSense. What is WaterSense? Accessed May, EPA WaterSense. WaterSense Labeled New Homes. August, EPA WaterSense. A Smart Investment with WaterSense August, Number of records found in all categories and regions for the EPA WaterSense Meet Our Partners. Accessed May, EPA WaterSense. Inspection and Verification Guidance for WaterSense Labeled New Homes. Version 1.2. July 24, Water usage savings calculated based on 20% reduction compared to a typical family of four. 21 International Code Council. California Green Building Standards Code California Code of Regulations,Title 24, Part 11 (CALGreen). Division 4.3 (p. 23) 22 Aquacraft Water Engineering and Management. California Water Use Efficiency Study. April 20, EPA WaterSense Our Water. Water use Today. Accessed May, EPA WaterSense Our Water. Why Water Efficiency. Accessed May, EPA WaterSense. Make the Drops to Watts Connection. February, EPA WaterSense. WaterSense Labeled Bathroom Sink Faucets & Accessories. February,

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