Po Brothers Excavation (808) 281-5102
Leach field trenches with perforated pipe bedded in gravel on an Upcountry Maui pasture lot

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Septic systems & cesspool conversion on Maui

New installs, cesspool conversions, pool digs and pool demolition. Here is exactly how the job runs, what it costs, and what makes the number move.

C-17 Licensed Contractor / LIC# CT-39777 / $2M Liability Insured / 10 Years on Maui / County of Maui & HIePRO Registered Vendor

The 2050 deadline

Every cesspool in Hawaii has to go by 2050

State law requires it, and the Department of Health lists Upcountry Maui as one of only two Priority 1 areas in the entire state — the ground where replacement matters most and happens first.

If you are on a cesspool Upcountry, this is not a maintenance question. It is a deadline with your address on it, and the work is easier to schedule now than in the rush later.

What a new septic install actually involves

  1. Site check

    We walk the property to work out access and where the system can physically go. Free, and it is the visit everything else is built on.

  2. The engineer designs it and files it

    An engineer runs the percolation test to see how your land drains, designs the system around that result, and submits the plans to the Department of Health.

  3. Approval — the long part

    Usually four to six weeks. No machine comes out until the plans clear, and nobody can shorten this part.

  4. We build it

    About two working weeks on average. Longer if the location, the soil, the rock or the size of the system says so.

One recent install, start to finish

New septic tank set in its excavation with inlet and outlet piping connected, before backfill
The tank set and plumbed
Leach field chambers laid end to end in a long trench beside a house
Leach field chambers in the trench
The same yard backfilled and graded smooth after the septic install, excavator parked at the far end
Backfilled and graded
Septic disposal bed of drain rock with white distribution pipe and green cleanout risers, a mini excavator at the far end of the trench
A gravel disposal bed with its distribution pipe and cleanouts, before it is covered

Cesspool conversion

Same build, plus the old cesspool has to be dealt with properly — pumped out, demolished and backfilled. That work is what adds the extra cost over a new install on bare ground.

What happens when we hit rock

Depends entirely where you are. In Kula blue rock is common; in Kihei and Wailea, especially farther south, we hit it on roughly nine pool or septic digs out of ten. In Kahului you are mostly in sand or old agricultural ground and it rarely comes up.

Because of that, there is a rock clause in every contract. If we hit rock the price goes up by $250 an hour — and only while the breaker is actually running. It is in the contract so it is never a surprise on the final invoice.

Pool digs and pool demolition

The same machines and the same excavation skill. We cut and form new pool excavations, and we demolish and backfill old ones. Where the ground is rock, the rock clause applies the same way.

Excavator with a hydraulic breaker demolishing a swimming pool surrounded by flagstone decking

Pool demolition — breaker working the deck.

Straight answer

These are ranges, not quotes

They come from systems we have actually put in on this island. Your number comes out of the on-site check and the engineer's design — and you get it itemized, usually three to five days after we have walked the property.

Related work

Often the same job

Talk to the man running the machine

No call center, no sales rep. Akua answers the phone, walks your property, and does the work.