Is your home CHERPing?


A partnership with the City of Claremont, California,
local energy efficiency experts and volunteers.

Water Saving Tips

Why conserve water?

To save money

  • The average home uses about 15,000 gallons of water per month at a cost of between a tenth of a cent per gallon (the lowest rate in Pomona) and half a cent per gallon (the highest rate in Claremont).  Typically about 70% of the water is used outdoors.  Clearly conserving water will not save a lot for the typical residential customer, but it can for heavy users (those with big lawns, for example).

Because water is going to be in short supply

  • More than half the water used in the Southland must be imported.  The Inland Empire is a semi-arid region, where demand (population) is increasing while local sources of water will be decreasing as our climate changes (about 4 degree F temperature increase is predicted for the Claremont area by 2050).  Most imported water comes from Northern California (the Sacramento River Delta), and some from the Colorado River.  Both sources are at risk for several reasons. 


Easy and pretty well-known:

  • Don’t let water flow when it isn’t being used (while brushing teeth, for instance). 
  • Be sure your toilets are the low-flush kind.  (Before 1994 toilets used about 3.5 gallons per flush, current models use about a third as much).
  • Use low-flow showerheads, and keep showers to about 10 minutes.
  • Front loading washing machines use less water than the top-loading kind.
  • Use full loads in clothes washers and dishwashers.
  • Capture and use rainwater in barrels, or larger containers.  It's mineral-free, great for potted plants!

Not so easy and obvious:

  • For hot water, consider installing a pump that diverts water into the cold water line until the hot water arrives (e.g., D'MAND instant hot water systems;


  • It’s best to water at early morning when little water is lost by evaporation.
  • Use efficient irrigation, such as drip systems.
  • Water deeply, but don't over-water.
  • Water only when necessary; monitor with a moisture sensor.
  • Use mulch in beds (but not touching trunks) to minimize evaporation.
  • Use waterwise landscaping techniques and plants; replace large lawn areas.
  • Adjust water controllers as the weather changes (automatic systems are available).
  • Use gray water for irrigation (easily installed three-way valves are available that divert washing machine water from the drain to an irrigation system).
  • Use a variable-flow nozzle on hand-held hoses, and use water only as needed.

Make use of the wealth of information on the web (,, etc).