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Low-flush toilet
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A low flush or low flow toilet is a flush toilet that uses significantly less water then a normal flush toilet, using as little as 1.6 gallons per flush as opposed to 7 gallons. They came into use in the United States in the 1990s with water conservation concerns.
 
Home Water Saving Technology
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Water-saving technology for the home includes:

  • Low-flow shower heads (sometimes called energy-efficient shower heads as they also use less energy, due to less water being heated).
  • Low-flush toilets, composting toilets and waterless urinals, which can have a dramatic impact in the developed world, as conventional Western toilets use large volumes of water.
  • Faucet aerators, which break water flow into fine droplets to maintain "wetting effectiveness" while using less water. As a bonus, they reduce splashing while washing hands and dishes.
  • Wastewater reuse or recycling systems, allowing:
    • Reuse of graywater for flushing toilets or for the garden, and
    • Recycling of wastewater through purification at a water treatment plant.
  • Waterless car wash
  • Rainwater harvesting
 
Water conservation
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Water conservation refers to reducing the use of water.

The goals of water conservation efforts include:

  • Sustainability - To ensure availability for future generations, the withdrawal of fresh water from an ecosystem should not exceed its natural replacement rate.
  • Energy conservation - Water pumping, delivery, and wastewater treatment facilities consume a significant amount of energy. In some regions of the world (for example, California ).
  • Habitat conservation - Minimizing human water use helps to preserve fresh water habitats for local wildlife and migrating waterfowl, as well as reducing the need to build new dams and other water diversion infrastructure.