Commercial buildings represent a sizable use of water from U.S. public water systems, include the largest accounts in many jurisdictions, and utilize water for many processes and end uses ripe for efficiency improvements. Yet water conservation efforts haven’t made the same headway in commercial buildings as in the residential sector. This presentation reviews what is known about water use in the commercial sector, discusses gaps in current knowledge and how an inability to describe the variation observed in water use limits water efficiency potential and summarizes recent efforts by EPA’s WaterSense and ENERGY STAR programs to bridge this gap.
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