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Study: Urban Water Use Will Outpace Efficiency Gains

But returning to “Hollywood” showers will just make things worse

Craig Miller

Californians may want to rethink the long-established tradition of watering the sidewalk.

You installed a low-flow toilet. You take fast showers. Your yard is water-wise and drought-tolerant. And even if everyone in California were just like you, which they’re not — yet — the state would still see a significant bump in urban water demand by the end of the century. The culprit: warmer temperatures caused by climate change.

An innovative new model developed by researchers at Oakland’s Pacific Institute shows that even if California meets its current goal of reducing per-capita water usage 20 percent by 2020 — and continues to improve water efficiency at a similar rate through the end of the century — still, by 2100 the state’s urban water demand will increase by eight percent, or roughly one million acre-feet (with all other factors held constant). That’s a lot of water: enough to satisfy the current household needs of 6.7 million Californians. Continue reading