The Federal Energy Management Program (FEMP) created a series of alternative water maps to help federal agencies strategically plan where to implement alternative water projects. Alternative water is water supplied by sustainable sources that can be used to help offset the use of fresh surface water and groundwater (such as lakes and aquifers).

Alternative water sources include:

  • Harvested rainwater
  • Captured condensate from air handling units
  • Reclaimed wastewater.

Alternative water is typically used in non-potable applications such as irrigation, cooling tower make-up, and vehicle wash.


Rainwater Harvesting Regulations Map
Provides information on how rainwater is regulated in each state, as well as regulatory and technical information where applicable.
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Rainwater Harvesting Tool
Geographic Information System (GIS) based mapping tool that provides zip-code-level monthly data to help federal agencies strategically prioritize commercial rainwater harvesting projects for general applications and landscape irrigation.
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Condensate Capture Potential Map
Provides data on the potential for condensate capture from air-conditioning systems across the United States.
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Reclaimed Wastewater Map
Map shows water utilities that sell reclaimed wastewater, which has potential for reuse in applications such as irrigation and industrial processes.
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Additional Resources