RAIN PRO, Inc. Rainwater Harvesting Systems 203 Spencer Street High Point, NC 27265 336.847.8421 Water Use and System payback Example The following is based on irrigation cost of $1,200.00 per year and considering 7% water cost increase for municipal water per year: Year                              Cost                        Combined Total 1                        $1,200.00                        $1,200.00 2                           1,284.00                           2,484.00 3                           1,373.00                           3,357.00 4                           1,470.00                           5,327.00 5                           1,572.00                           6,899.00 6                           1,683.00                           8,582.00 7                           1,800.00                         10,382.00 8                           1,926.00                         12,308.00 9                           2,061.00                         14,369.00 10                           2,206.00                         16,575.00 11                           2,360.00                         18,935.00 12                           2,565.00                         21,500.00 13                           2,744.00                         24,244.00 14                           2,936.00                         27,180.00 15                           3,141.00                         30,321.00 The above chart is based purely on speculation that municipal water costs will rise from five to ten percent per year and that the average homeowner will have spent $1,200.00 for irrigation during the year. For more accurate calculations, please contact your municipal water supplier for historical averages. The above is based on normal water prices. Some cities are proposing to increase water rates from 50% to as much as 500% for excessive use.