“San Francisco’s Tallest Building Makes Big Water Recycling Statement”

"Of particular interest to me, Salesforce Tower will also house the largest water recycling system in a commercial high-rise building in the United States. A black-water system will recycle all of the water used in the building to be available again for nonpotable uses, saving about 30,000 gallons of freshwater a day."

https://www.newsdeeply.com/water/community/2018/01/31/san-franciscos-tallest-building-makes-big-water-recycling-statement

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