Hawaiʻi law requires every cesspool in the state to be converted by January 1, 2050 — roughly 88,000 of them, more than 11,000 on Oʻahu, per the Hawaiʻi Department of Health. These are the questions we get asked on the job, answered properly. Start with the Hawaiʻi cesspool conversion guide, or call (808) 630-9966 — the inspection is free.
Cesspool & Septic Resources for Oʻahu
Toilet Backing Up? What Your Septic Tank Is Telling You
August 21, 2026
Most people find out their septic tank is full at the worst possible moment. It almost always gives warning first — the signs are just easy to misread as ordinary plumbing problems.
Hawaiʻi's Cesspool Conversion Loan Program: What We Know So Far
August 6, 2026
A $25,000 to $50,000 conversion is the single biggest objection we hear. A new state loan program launching this year changes the math for Oʻahu owners — what is confirmed, what has expired, and the one part of the process we handle.
Does Hawaiʻi's 2050 Cesspool Law Apply to My Property?
August 6, 2026
There is a persistent myth that the 2050 mandate only covers properties near state waters. It does not. Act 125 applies to all ~88,000 cesspools in Hawaiʻi, wherever they sit.