Septic suitability in Maui County, HI

Very limited

Maui County, HI's SSURGO dominant class comes back "Very limited", covering 94.8% of the county. Practically, that rules out a simple gravity system for most of the county - 94.8% of it sits in USDA's most-constrained bucket. For scale: 1,161.54 square miles and 163,688 people call Maui County home.

Before you rely on this for one lot

Nothing about Maui County, HI's SSURGO figure applies to a specific address - it's a county-wide average. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Maui County, HI

Maui County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.

Maui County's rank among Hawaii counties

Among the 3,058 rated counties on this site, Maui County, HI ranks 684 most-constrained nationally, and 1 of 3 within Hawaii.

Further reading

How this rating is built, and its real limits · Conventional vs. engineered septic systems