BWS WaterSensible Residential Rebates (Doubled Rebates)
Toilet (WaterSense): up to $200; Clothes washer (ENERGY STAR): $150; Smart water monitor: up to $400; Rain barrel: $40; Weather-based irrigation controller (WBIC): rebate available. Amounts doubled as of Jan 2026.
Honolulu Board of Water Supply (BWS) + Dept. of Environmental Services
Residential BWS account holders on Oʻahu; not for new construction. Must be a Honolulu Board of Water Supply (BWS) customer on O‘ahu who receives potable water services from BWS to be eligible for rebates.
No income requirement
Oʻahu / Honolulu
May 26, 2026
This tool is a guide only. The administering agency makes the final eligibility determination.