Peachtree City, GA rainwater: 39,184 gallons off a roof
Peachtree City, GA: gallons off the roof each year
39,184gallons a year
That is a 1,500 sq ft asphalt roof under Peachtree City, GA's normal 49.3 inches of rain, about 795 gallons for every inch that falls.
In Peachtree City, GA a single barrel does most of the work. Storms come often enough that a small tank refills before it runs dry, and a bigger one would mostly sit full.
Rainfall: NOAA 1991-2020 climate normals, the Atlanta station (2.0 mi away). Peachtree City, GA ranks 90th wettest of the 101 cities covered in Georgia.
Month by month in Peachtree City
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.29 | 3,410 | |
| Feb | 4.61 | 3,664 | |
| Mar | 4.90 | 3,895 | |
| Apr | 3.77 | 2,996 | 72 |
| May | 3.12 | 2,480 | 153 |
| Jun | 4.45 | 3,537 | |
| Jul | 4.84 | 3,847 | |
| Aug | 3.96 | 3,147 | 49 |
| Sep | 3.52 | 2,798 | 103 |
| Oct | 3.37 | 2,678 | 122 |
| Nov | 3.91 | 3,108 | |
| Dec | 4.56 | 3,624 |
Mar is the wettest month (4.90 in, 3,895 gal off the roof); May the driest (3.12 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
Which tank size is worth it in Peachtree City
Best fit: one 55-gallon barrel, which delivers about 412 gallons to the garden in a normal year (82.4% of its need).
If you buy one, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Peachtree City's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 412 | 37,647 |
| 110 gal | 412 | 37,647 |
| 165 gal | 412 | 37,647 |
| 275 gal | 412 | 37,647 |
| 550 gal | 412 | 37,647 |
| 1,000 gal | 412 | 37,647 |
| 1,500 gal | 412 | 37,647 |
| 2,500 gal | 412 | 37,647 |
| 5,000 gal | 412 | 37,647 |
Simulated storm by storm through a normal year using the station's count of days with 0.1 in or more of rain each month.
Is rainwater collection legal in Georgia?
Legal. Outdoor irrigation use is unrestricted; indoor non-potable systems must follow Appendix I 'Rainwater Recycling Systems' of the Georgia amendments to the state plumbing code. No state storage cap; potable use depends on local rules.
Checked against the current source on 2026-11-06. Source