When you do the math, it doesn't seem very practical. I have a very large yard (9,000 sq ft) and my irrigation usage can be as high as 15,000 gallons a month. Seems like a couple of 50 gallon rain barrels wouldn't even make a dent in my water bill. Even a normal size yard probably uses 5,000+ gallons a month. Check your own water bill for actual usage.
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