Martin County, TX: the USDA septic-suitability picture

Somewhat limited

Martin County, TX: USDA's soil survey calls 70% of the county "Somewhat limited" for a septic leach field. A conventional system can still work here with design changes - a larger field, added fill, or a shallower layout - but it isn't guaranteed. For scale: 914.956 square miles and 5,179 people call Martin County home.

Before you rely on this for one lot

USDA's survey covers the whole of Martin County, TX at once, not any single address. 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 Martin County, TX

Martin 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.

Where this sits nationally

Among the 3,058 rated counties on this site, Martin County, TX ranks 3,028 most-constrained nationally, and 245 of 253 within Texas.

Before you act on this

How this rating is built, and its real limits · How a percolation test actually works