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WECalc - Your Home Water-Energy-Climate Calculator

WECalcYou can save water at home -- and save energy, reduce greenhouse gas emissions, and save money in the process! WECalc, the Pacific Institute's Water-Energy-Climate Calculator, asks you a series of questions about your home water use habits, and based on your replies, estimates your water use and provides personalized recommendations for reducing it. WECalc also estimates your water-related energy use and associated greenhouse gas emissions and shows you how much you can save -- and how to do it. Check out WECalc at

Saving water saves energy because capturing, transporting, treating, and using water is highly energy-intensive. And energy use releases greenhouse gases to the atmosphere; use less water, emit less greenhouse gas. A Pacific Institute report on water conservation and efficiency found that implementing widely available, cost-effective technologies and practices could reduce California’s current urban water use by a third, and the California Energy Commission concluded that water conservation and efficiency improvements could produce 95% of the energy savings as traditional energy-efficiency programs at 55% of the cost. You can save money while you save water.

Find out how much water and energy you use at home, for showers, clothes washers, dishwashers, faucets, lawns, and more. Because the bottom line is that saving water saves energy and reduces greenhouse gas emissions. How much can you save, and how much will it cost? Get started on WECalc and find out!

WECalc was made possible with support from the Argosy Foundation.

Go to WECalc.

Download the full Data and Assumptions behind WECalc (PDF).

Download the WECalc press release.

Read more about water conservation and efficiency:
Soft Path for Water



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Use WECalc

Data and Assumptions behind WECalc

WECalc Press Release


The Soft Path for Water

Waste Not, Want Not: The Potential for Urban Water Conservation in California

California Water 2030: An Efficient Future

Sustaining California Agriculture in an Uncertain Future