Simpson County, MS Shrink-Swell Risk

Shrink-swell potential in Simpson County, MS

Low

Soil across 84.3% of Simpson County, MS comes back "Low" in USDA's shrink-swell data, averaging 1.48% linear extensibility. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Simpson County, MS - never a reading for one specific parcel. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Simpson County: the real numbers

Simpson County's soil reading points toward standard foundation practice as the likely outcome, not the exception. A geotechnical report runs $1,000-$5,000, typically around $2,700. Foundation repair, if a specific lot turns out to differ from the county average, runs $5,000-$15,000.

How Simpson County, MS compares

Among the 3,085 rated counties on this site, Simpson County, MS ranks 2,539 most-constrained nationally, and 73 of 82 within Mississippi. The county spans 589 square miles, home to 25,597 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Pinellas County, FL and Claiborne Parish, LA are worth a look for comparison.

How this reading is built, and its real limits · Moisture management: the cheap fix that works on any soil

Elsewhere in Mississippi

Every county in Mississippi is on this site, including Adams County, MS and Pike County, MS. The full underlying dataset is downloadable directly, one row per county.