The Water Research Foundation (WRF) announced the results from “Residential End Uses of Water, Version 2” in April. An update to its 1999 report, the study includes data from 23 participating utilities across the U.S. and Canada. Among the key findings:
- Residential indoor water use in single-family homes has decreased 22 percent from 177 gallons per household per day (gphd) to 138 gphd.
- Toilet flushing is the largest indoor use of water in single-family homes, followed by faucets, showers, clothes washers, leaks, bathtubs, other indoor uses and dishwashers.
- The current average daily indoor per household use of 138 gphd could decrease to 110 gphd with full adoption of water-efficient fixtures.
- Forty-six percent of homes in the new study had water-efficient clothes washers, compared to six percent in 1999, and 37 percent of the participating homes had efficient toilets, compared to five percent in 1999.
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The report is available at www.waterrf.org/Pages/Projects.aspx?PID=4309.