Walthall County, MS Shrink-Swell Risk

Walthall County's SSURGO shrink-swell reading

Low

In Walthall County, MS, 99.3% of the surveyed soil carries a "Low" shrink-swell rating, 1.12% linear extensibility on average. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

Before you rely on this for one address

Walthall County's reading is an average across the whole county, not a promise about any one lot inside it. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Budgeting for Walthall County, MS

Walthall 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.

Where this sits nationally

Among the 3,085 rated counties on this site, Walthall County, MS ranks 2,829 most-constrained nationally, and 81 of 82 within Mississippi. The county spans 404 square miles, home to 13,839 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Uinta County, WY and Scott County, TN 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 Hancock County, MS and Yazoo County, MS. The full underlying dataset is downloadable directly, one row per county.