According to the United States Environmental Protection Agency (EPA), the commercial and institutional sector — which includes office buildings, schools, hotels, restaurants, hospitals, laboratories, and so on — is the second largest consumer of publicly supplied water in the U.S., accounting for 17 percent of the withdrawals from public water supplies. With the exception of restaurants, where most water is used in the kitchen, the biggest category of water usage is Domestic/Restroom. In office buildings, for example, 37 percent of water use falls into this category. For schools, it’s 45 percent.
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