📊 Water Yield & Storage Sizing
Annual Rainwater Harvested
48,034 Gallons /yr
Total Annual Household Water Demand
43,800 Gallons /yr
Net Annual Water Surplus / Deficit
+4,234 Gal (Surplus)
Recommended Cistern Storage Tank Size
10,800 Gallons
First-Flush Diverter Volume Needed
24–48 Gallons
💧 Standard Rule: 1 inch of rain on a 1,000 sq ft roof yields approximately 623 gallons of pure fresh water.