Board of Water Supply Rebates on O'ahu
The Honolulu Board of Water Supply offers rebates for water-efficient upgrades — from toilets and showerheads to irrigation controllers and leak repairs. Alpha Omega installs qualifying fixtures and systems, and we can help you understand what you're eligible for before any work begins.
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What We Do
Rebate-Eligible Installations We Perform
The BWS rebate program covers a range of water-saving upgrades — we install them all.
High-Efficiency Toilet Installation
WaterSense-certified toilets that use 1.28 gallons per flush or less qualify for BWS rebates. We remove and replace your old toilet with a qualifying model — typically saving 20–60% on toilet water use.
Low-Flow Showerhead Installation
Qualifying low-flow showerheads (2.0 GPM or less) can receive BWS rebates. We install WaterSense-certified showerheads in all bathrooms — saving thousands of gallons per year without sacrificing performance.
Smart Irrigation Controller Installation
Weather-based irrigation controllers adjust watering schedules automatically based on rainfall and evaporation. These qualify for BWS rebates and can reduce outdoor water use by 15–30%.
Leak Detection & Repair
The BWS offers rebates for fixing leaks that have caused abnormally high water bills. We document the leak, perform the repair, and provide the service records you need for your rebate application.
Water Heater Upgrade
Certain high-efficiency and heat pump water heaters qualify for utility and state rebates. We can advise on which models are currently eligible and handle the installation.
Rebate Documentation Assistance
BWS rebates require proof of purchase, contractor license information, and installation records. We provide all the paperwork you need to submit your rebate application successfully.
Don't Wait
How to Maximize Your BWS Rebates
Check BWS eligibility before purchasing fixtures — not all models qualify
Keep all receipts and purchase documentation for the rebate application
Rebates must typically be applied for within 90 days of installation
Licensed contractor installation is required for most rebate categories
Combination rebates are available when doing multiple upgrades at once
Some rebates are first-come, first-served with limited annual funding
Rebate amounts and eligible products change — check BWS.net for current offerings
Common Questions
Frequently Asked Questions
What is the Honolulu Board of Water Supply rebate program?
The BWS offers cash rebates to O'ahu residents and businesses who install water-efficient fixtures and systems. The goal is to reduce island-wide water consumption. Rebates range from $20–$100+ per fixture depending on the category. Visit bws.net for current rebate amounts and eligible products.
Do I have to use a licensed plumber to qualify?
For most rebate categories, yes — licensed contractor installation is required for the rebate to be valid. We're licensed in Hawaii and can provide all necessary documentation.
How long does a rebate take to process?
BWS typically processes rebate applications within 8–12 weeks of receiving a complete application. We give you all the paperwork at the time of installation to make the submission easy.
Can I get rebates on multiple items at once?
Yes. Combination rebates are available and can make a multi-fixture upgrade even more cost-effective. If you're planning a bathroom remodel or whole-house efficiency upgrade, bundling the qualifying work maximizes your rebate.
Areas We Serve
Serving all of O'ahu — view all service areas
Get the Upgrades — Get the Rebate
Water-efficient upgrades pay for themselves faster when you factor in BWS rebates. Call us to discuss which upgrades make sense for your home and what you qualify for.