Check Local Legality
2 hoursSome US western states restrict rain collection — verify code.
Field context
This workflow is part of 6 niche fields
Free step-by-step rainwater harvesting for garden irrigators. Plan rainwater harvesting with calculators and checklists covering check local legality, size.
Some US western states restrict rain collection — verify code.
Calculate catch: 1 inch rain on 1000 sq ft roof = 623 gallons theoretical.
Barrels, downspout diverter, hose, mosquito screen.
Estimate gallons replacing tap for garden monthly.
Roof zone to barrel count.
| Roof Section | Barrels | Irrigation Area |
|---|---|---|
| 500 sq ft | 1×55 gal | Small bed |
| 1000 sq ft | 2–3 | Medium yard |
| 2000 sq ft | 4+ | Large garden |
Rain chain plus barrel aesthetic.
Overflow 6 ft from foundation.
Link barrels for capacity.