WaterSense Labeled Homes liiiiSliairu I ;¦ ffl 3 i li ^ K 1JL1ELI- -.ffl" , U!i!® - Delivering on Efficiency in San Diego, Californi The U.S. Environmental Protection Agency (EPA) established WaterSense to protect the future of the nation's water supply and to promote water- efficient products, homes, and programs with a simple, easy-to-identify label. WaterSense labeled homes allow families to enjoy the comforts of home while using less water and energy and saving money on utility bills. To earn the WaterSense label, homes must meet EPA's specification criteria: they must be at least 30 percent more water-efficient than typical new home construction, include WaterSense labeled plumbing products, and be free of water leaks. WaterSense labeled homes can also include features such as: hot water that gets to the tap faster; ENERGY STAR® certified appliances; efficient irrigation equipment; and water-smart landscapes that minimize or eliminate the need for irrigation. Why Water Efficiency Matters to Communities and Builders Benefits of WaterSense Certification For Communities/Water Agencies: • Preserves the ability to add new housing and grow communities while limiting impacts on water and infrastructure resources. • Achieves greater water efficiency using a whole-house, building-science approach and system solutions that may not be possible solely with efficient products. • Encourages builders to design homes with water-efficient features in mind, maximizing water savings at minimal incremental cost. For Builders: • Mitigates the rising cost of water and utility connection fees. • Leverages support from existing communities and investors. • Offers advantages in the permitting and land entitlement processes. • Supports corporate disclosures and reporting. In areas such as San Diego where drought and water supplies are an ongoing concern, using water wisely is critical. Due to limited local water supplies, more than 80 percent of San Diego's water is imported from Northern California and the Colorado River, areas also prone to drought. The figure on the next page shows the drought status in San Diego County, California, between 2000 and 2023, with yellow denoting abnormally dry conditions and darker colors indicating even greater drought intensity. Over the same period, San Diego County's population increased by 16 percent, representing more than 460,000 additional residents. While the area is working to diversify its water supply portfolio, these efforts can carry 1 ------- significant costs for local governments and customers. San Diego and similar areas need to plan communities wisely to make the best use of local and regional water resources as population grows, WaterSense labeled homes can help preserve the ability to add housing in communities that are water- or infrastructure-constrained by minimizing the impact of new construction on water resources. Simultaneously, they can also mitigate the impact of rising costs of water and connection fees. San Diego County (CA) Percent Area in U.S. Drought Monitor Categories 100.00% 80.00% 60.00% 40.00% 20.00% 0.00% NJNJNJNJNJNJNJNJNJKJNJNJNJKJNJNJNJNJNJKJNJNJNJNJNJ OOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOO —» —» —1 —» —* —» —' —' —1 —'NJNJNJNJfsJ O —>'NJUlJik^ON^vlOOVOO—^>NJU)4^Cn<^-vJCX3vOO—^ DO (Abnormally Dry) D1 (Moderate Drought) D2 (Severe Drought) D3 (Extreme Drought) D4 (Exceptional Drought) Why Choose WaterSense Labeled Homes The WaterSense label for homes provides a whole-house approach to water efficiency. The programs that certify homes through WaterSense address specific climate and market conditions by encouraging system and design improvements in addition to efficient products and appliances. This approach helps maximize savings and reduce costs for the builder, the homeowner, and the community. WaterSense labeled homes can achieve significantly more savings than homes with WaterSense labeled plumbing products alone. Plus, WaterSense labeled homes carry the additional benefit of being independently certified to ensure they are free of leaks and that products and systems are properly installed to maximize savings. Maximizing Water Savings With WaterSense Labeled Homes The table on the next page illustrates the features that may be included under four scenarios in San Diego. This example uses a typical 2,400-square-foot home with an average-sized household (2.61 occupants) on a 10,000-square-foot lot that includes 5,826 square feet of conventional, irrigated turf (unless otherwise specified). Assumptions for a typical home are based on national averages. The baseline home includes products meeting federal efficiency standards and other features typical of new construction. The home following the Mandatory Checklist for WaterSense Labeled Homes includes WaterSense labeled toilets, faucets, and showerheads, but no additional water-efficient features. The home meeting California Standards is required to meet more rigorous product efficiency criteria for certain plumbing products. Finally, the example WaterSense labeled home incorporates a variety of water-efficient indoor and outdoor features that meet the water efficiency requirement for WaterSense labeled homes and result in substantially more water savings. 2 ------- This is just one example of a home that has earned the WaterSense label—other design configurations could also meet the requirement. The example shows that for coastal desert climates such as San Diego's, improvements in indoor water efficiency will not be sufficient to achieve the 30 percent threshold. The home will generally need to focus on maximizing outdoor water savings (e.g., reducing turf and using non-irrigated or natural areas to reduce irrigable landscape area) to ensure it is at least 30 percent more water-efficient than typical new construction. Feature Baseline Home Home Meeting WaterSense Mandatory Checklist Home Meeting California Appliance Efficiency Standards Example WaterSense Labeled Home in San Diego* Toilets 1.6 gpf 1.28 gpf 1.28 gpf 1.1 gpf Showerheads 2.5 gpm 2.0 gpm 1.8 gpm 1.8 gpm Lavatory Faucets 2.2 gpm 1.5 gpm 1.2 gpm 1.2 gpm Kitchen Faucets 2.2 gpm 2.2 gpm 1.8 gpm 1.5 gpm Dishwashers 5.0 gpc 5.0 gpc 5.0 gpc 3.5 gpc (ENERGY STAR) Clothes Washers 6.5 IWF 6.5 IWF 6.5 IWF 4.3 IWF (ENERGY STAR) Hot Water Delivery Standard Standard Standard More efficient hot water delivery Landscape and Irrigation Turf irrigated with standard fixed spray sprinklers and timer-based controller Turf irrigated with standard fixed spray sprinklers and timer-based controller Turf irrigated with WaterSense labeled spray sprinkler bodies and timer- based controller 15% reduction in irrigable landscape; 35% of remaining landscape converted to non- turf design with pressure- compensating drip irrigation; WaterSense labeled spray sprinkler bodies and irrigation controller Total Estimated Annual Water Use 153,000 gallons 141,000 gallons 139,000 gallons <107,000 gallons Total Estimated Annual Water and Percent Savings From Baseline 0 gallons 0% savings 12,000 gallons 5 to 10% savings 14,000 gallons 6 to 12% savings >46,000 gallons >30% savings Feature meets federal standard or common construction practices Feature meets WaterSense or ENERGY STAR criteria Feature achieves greater efficiency level than WaterSense product specification criteria gpf = gallons per flush; gpm = gallons per minute; gpc = gallons per cycle; IWF = integrated water factor * For example purposes only. Home could qualify with a different combination of features, and a different home with these features is not guaranteed to achieve WaterSense certification. Learn More Interested in learning more about WaterSense and how it can benefit your community? Visit www.epa.gov/watersense. PHONE (866) WTR-SENS (987-7367) WEBSITE www.epa.gov/watersenseEMAILwatersense@epa.gov &ERA EPA-832-F-23-002E May 2023 3 ------- |