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Texas Rainwater Harvesting
Texas Rainfall Catchment
℠
Rainwater Harvesting Systems Design and Installation Services
Capture, store and use the best water you can get
®
Catch Texas Rain - Rainwater Harvesting Calculator
Rainwater Harvesting Calculator
Use this calculator to
estimate
how much rain your roof might collect in a year and potentially how much water storage you might need.
Choose the nearest Texas city:
--Select--
Abilene
Alpine
Amarillo
Austin
Beaumont
Boerne
Brady
Brownsville
College Station
Corpus Christi
Dallas
El Paso
Fredericksburg
Ft. Davis
Ft. Stockton
Ft. Worth
Houston
Junction
Kerrville
Lampasas
Lubbock
New Braunfels
San Angelo
San Antonio
Texarkana
Victoria
Waco
Wichita Falls
Choose the type of roof:
--Select--
Composition
Concrete
Metal
Slate
Tile
Enter the
roof footprint
in square feet:
The roof footprint is the length times the width of the roof area without regard to the pitch. If you don't know the roof foot print and your house is 1 storey, enter the house square footage plus eave overhangs.
or
Choose a roof size:
Small
Medium
Large
Store water for landscaping use only?
Store water for in house use only?
Store water for both house and landscape?
Enter your
average monthly landscape
water use in gallons:
Use your monthly water bills to estimate your average monthly water use for landscaping and household. Compare the water bills from December - February to the water bills from May - October. The average difference between the two time periods is a good estimate for your landscaping use. If you don't have your water bills, enter 3000.
Landscape water use, by default, covers May - October. If you water during other months, please select those months below.
January
February
March
April
November
December
Enter your
average monthly household
water use in gallons:
Use the average of your water bills from December - February to estimate household usage. If you don't have your water bills, mutiply the number of people in the household by 50 and then by 30 (e.g. 2 adults and 1 child * 30 days = 4500 gallons).
Note: The numbers derived from this calculator are high-level estimates only and are meant only to give you an idea of your catchment potential. The calculated storage amount needed assumes that you have no back-up water supply and includes a 75 day cushion for dry periods.
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