National estimate of urban tree and landscape residue (cubic yards/year).
| Generator group | Overall population (N) | Sample mean | Bound on mean | Residue production (000s) | Bound on generator (000s) | % Error |
|---|---|---|---|---|---|---|
| Community tree care | 10,414 | 7,004 | 3,177 | 72,937 | 27,137 | 37% |
| Utilities | 1,916 | 4,872 | 661 | 9,334 | 841 | 9% |
| Municipalities | 2,662 | 5,883 | 2,041 | 15,527 | 5,375 | 35% |
| Parks & Rec. Depts. | 4,460 | 5,018 | 4,117 | 22,382 | 8,171 | 37% |
| Land clearance | 1,316 | 4,229 | 4,662 | 5,565 | 2,325 | 42% |
| Lawn/garden/landscapers | 35,100 | 2,130 | 330 | 74,780 | 11,570 | 15% |
| Total/mean | 55,868 | 3,588 | 744 | 200,525 | 31,178 | 16% |