Sand Springs, OK rainwater: 35,186 gallons off a roof
Rainwater from a roof in Sand Springs, OK
35,186gallons a year
That is a 1,500 sq ft asphalt roof under Sand Springs, OK's normal 44.3 inches of rain, about 795 gallons for every inch that falls.
In Sand Springs, OK 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 Tulsa 6.3 Wsw station (6.7 mi away). Sand Springs, OK ranks 7th wettest of the 45 cities covered in Oklahoma.
Month by month in Sand Springs
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 1.93 | 1,534 | |
| Feb | 1.80 | 1,431 | |
| Mar | 3.38 | 2,686 | |
| Apr | 4.30 | 3,418 | 6 |
| May | 5.58 | 4,435 | |
| Jun | 4.80 | 3,815 | |
| Jul | 4.69 | 3,728 | |
| Aug | 4.24 | 3,370 | 14 |
| Sep | 3.84 | 3,052 | 64 |
| Oct | 4.16 | 3,306 | 24 |
| Nov | 2.91 | 2,313 | |
| Dec | 2.64 | 2,098 |
May is the wettest month (5.58 in, 4,435 gal off the roof); Feb the driest (1.80 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
What size rain barrel for Sand Springs
Best fit: one 55-gallon barrel, which delivers about 89 gallons to the garden in a normal year (83.0% of its need).
Before you buy, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Sand Springs's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 89 | 34,197 |
| 110 gal | 89 | 34,197 |
| 165 gal | 89 | 34,197 |
| 275 gal | 89 | 34,197 |
| 550 gal | 89 | 34,197 |
| 1,000 gal | 89 | 34,197 |
| 1,500 gal | 89 | 34,197 |
| 2,500 gal | 89 | 34,197 |
| 5,000 gal | 89 | 34,197 |
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 Oklahoma?
Encouraged through state legislation: Water for 2060 Act
From the 2015 (Pacific Northwest National Laboratory report 24347); not yet re-checked against current law, so check with your state water agency before building anything large. Source