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Source: Graphic Source: Texas Water Development Board

Note: The area under the curves in the graph above represents the amount of water in storage at the end of each month. The assumptions are:

• A Dallas family of three.

• 1,000 gallons to start.

• Each member uses 33 gallons per day for indoor use.

• Irrigation demand of 150 gallons from March through October.

• A collection efficiency of 85%.

• A roof area of 2500 SF.

The upper curve denotes water availability using average monthly rainfall data. The lower curve is based on the monthly median rainfall. A 10,000-gallon cistern is used for storage of rainwater. 

See average DFW rainfall here.

For further information about Renewable Water and Energy in this area of Texas contact

Terry Jensen
972 251-1532 or 817 545-0140
Email