Big Bend Conservancy
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As a person whose entire house relies solely on rain water for all my needs, my experience says they simply need to increase storage. When rains are good, I top off my tanks.
Before I ran screaming out of my tax obsessed home town Austin, I paid attention to how much water we used via the water bill. 3000 gallons a month. I didn't water outside at all, didn't conserve in the house, and had a big fat clothes washing machine that had to fill up all the way. Knowing this number, I opted for 30,000 gallons of storage. Three 10,000 gallon tanks. Built my own Barndominuim for catching rainwater that my tanks and I live under. 5400 square feet of catching area. Much smaller living area. 1 inch of rain on 1000 square feet gets a person 600 gallons of water, if you catch it all. The math says when I get 1 inch of rain, I get 3200 gallons of water. IF I catch it all. Big problem in the hill country is that when storms come, they dump like crazy. You really need to design a system to handle the big fast rains.Lived here for 15 years. Worst time we made it through, it didn't rain for 59 days some 7 years back. Still had 30% left. I still don't water outside. But I do fill up a 4 foot x 16 foot swimming pool every summer.It all depends on where you live, I 35 (the Balcones Escarpment) is a dividing line where rain fall totals change dramatically, so the design needs to reflect your specific area's annual rainfall. I strongly encourage you to make the switch to rain water. God always provides!
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