The City of Austin Water Utility offers a capacity-based: $0.50 per gallon for non-pressurized systems (no pumps), not to exceed 50% of system cost $1.00 per gallon for pressurized systems (with pump), not to exceed 50% of system cost Total maximum lifetime rebate amount of $5,000 per site All sizes of rain barrels and rainwater … Continue reading Austin Texas Rainwater Collection System Rebate- Rainwater Harvesting