Haverstraw, NY rainwater: 39,995 gallons off a roof
Haverstraw, NY: gallons off the roof each year
39,995gallons a year
That is a 1,500 sq ft asphalt roof under Haverstraw, NY's normal 50.3 inches of rain, about 795 gallons for every inch that falls.
In Haverstraw, NY 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 West Nyack 1.3 Wsw station (7.0 mi away). Haverstraw, NY ranks 13th wettest of the 90 cities covered in New York.
Month by month in Haverstraw
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.74 | 2,973 | |
| Feb | 3.10 | 2,464 | |
| Mar | 4.33 | 3,442 | |
| Apr | 4.13 | 3,283 | 27 |
| May | 4.01 | 3,187 | 42 |
| Jun | 4.66 | 3,704 | |
| Jul | 4.44 | 3,529 | |
| Aug | 4.90 | 3,895 | |
| Sep | 4.71 | 3,744 | |
| Oct | 4.38 | 3,481 | |
| Nov | 3.50 | 2,782 | |
| Dec | 4.42 | 3,513 |
Aug is the wettest month (4.90 in, 3,895 gal off the roof); Feb the driest (3.10 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 Haverstraw
Best fit: one 55-gallon barrel, which delivers about 52 gallons to the garden in a normal year (74.5% 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 Haverstraw's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 52 | 38,712 |
| 110 gal | 52 | 38,712 |
| 165 gal | 52 | 38,712 |
| 275 gal | 52 | 38,712 |
| 550 gal | 52 | 38,712 |
| 1,000 gal | 52 | 38,712 |
| 1,500 gal | 52 | 38,712 |
| 2,500 gal | 52 | 38,712 |
| 5,000 gal | 52 | 38,712 |
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 New York?
No statewide rainwater harvesting regulations; check county for local incentives
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