Septic suitability in Bristol County, MA

Very limited

USDA puts Bristol County, MA at "Very limited" for septic absorption fields, the dominant reading across 82.2% of the county's soil. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 82.2% of Bristol County's land. For scale: 553.118 square miles and 588,593 people call Bristol County home.

Before you rely on this for one lot

This is a countywide, area-weighted figure across every soil survey map unit in Bristol County, MA - never a reading for one specific parcel. 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 Bristol County, MA

Bristol 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, Bristol County, MA ranks 1,912 most-constrained nationally, and 7 of 14 within Massachusetts.

Further reading

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