Conversion funding programs
Loans, grants, and tax credits that apply to replacing a cesspool. Programs open and close, and some run only while a funding round is live. Each card below says when it was last checked.
Confirm anything here with the agency that runs it before you rely on it.
Verification pending. Program terms, eligibility, and status below are placeholders awaiting confirmation against each agency's own publication. Nothing here should be relied on until the card says it was verified.
Alert me when a program opens for my island
One email when a program on your island changes status. Nothing else.
Statewide
Available anywhere in Hawaii, on top of any county program.
Unverified, confirm before relying on it
Cesspool conversion loan fund
Hawaii Green Infrastructure Authority
OffersLoan
QualifiesConfirm
TermsConfirm
StatusConfirm
Last checked2026-09-07
Unverified, confirm before relying on it
Income tax credit for cesspool conversion
State of Hawaii Department of Taxation
OffersTax credit
QualifiesConfirm
TermsConfirm
StatusConfirm
Last checked2026-09-07
Hawaii Island
Unverified, confirm before relying on it
County cesspool conversion grant
County of Hawaii
OffersGrant
QualifiesConfirm
TermsConfirm
StatusConfirm
Last checked2026-09-07
Kauai
Unverified, confirm before relying on it
County cesspool conversion grant
County of Kauai
OffersGrant
QualifiesConfirm
TermsConfirm
StatusConfirm
Last checked2026-09-07
Maui
Unverified, confirm before relying on it
County cesspool conversion grant
County of Maui
OffersGrant
QualifiesConfirm
TermsConfirm
StatusConfirm
Last checked2026-09-07
Molokai
Molokai is in Maui County, so the Maui County program applies here. It is listed again for convenience.
Unverified, confirm before relying on it
County cesspool conversion grant
County of Maui, covering Molokai
OffersGrant
QualifiesConfirm
TermsConfirm
StatusConfirm
Last checked2026-09-07
Oahu
Unverified, confirm before relying on it
County cesspool conversion grant
City and County of Honolulu
OffersGrant
QualifiesConfirm
TermsConfirm
StatusConfirm
Last checked2026-09-07
Worth doing while you wait
Most programs need a site assessment and a replacement system design before you can apply, and those take time to arrange. Getting the assessment done now means you are ready when a round opens rather than starting from scratch. You can request one here.