Rain barrels and cisterns · Hawaii

Honolulu BWS Residential Rain Barrel Rebate

Run by Honolulu Board of Water Supply (Water Sensible Program)

OpenLast checked October 17, 2026
What you get
$40 per rain barrel, limit 4 per applicant
Maximum
$160 per household
Who qualifies
Residential Honolulu BWS account holders receiving potable water from BWS (owner occupant, landlord or tenant can apply). Rebate goes to the account holder, who can reassign payment to another payee.
Where
Residential customers of Honolulu Board of Water Supply on Oahu.
Status
Open. While funding lasts (payment not guaranteed)
Type of payment
Rebate
Official program page

What you do

Buy and install a manufactured rain barrel of 45 gallons or more.

Requirements

  • Barrel at least 45 gallons
  • Manufactured for rain capture and bought as a complete barrel; homemade barrels and BWS-supplied barrels not eligible
  • Device cost must be at least the rebate amount
  • New equipment, installed
  • Application received within 6 months of purchase date
  • Copy of receipt showing make, model, cost and purchase date
  • BWS may inspect before payment and up to 5 years after
  • One rebate per device type per applicant over time (previously rebated applicants ineligible for the same device type)
  • IRS Form 1099 if combined rebates reach $600

How to apply

  1. 1Buy and install the rain barrel
  2. 2Fill out the Residential Rebate Application (Rev 4.2026), steps 1-5 including BWS account number from your water bill
  3. 3Sign the Terms and Conditions agreement
  4. 4Mail to Water Sensible Program, P.O. Box 1440, Honolulu, HI 96806 or email [email protected] with a copy of the receipt
  5. 5Wait for processing; a check is mailed to the payee

Timing and deadlines

6 to 8 weeks processing

Application within 6 months of purchase

Combining it with other programs

Can be combined with other BWS Water Sensible rebates on the same application (different device types)

Sources

Last checked October 17, 2026. See something out of date? Tell us.

Sow is not affiliated with any of these agencies or utilities. Amounts and rules change, often at the start of a fiscal year, so confirm the details on the official page before you start a project. How we research these programs

More programs near the same area