Tangipahoa Parish, Louisiana

Survey Area LA105• Louisiana

The dominant drainage class is Well drained and the dominant hydrologic group is C/D (varies with drainage). The most common soil order is Ultisols — strongly weathered soils with clay-enriched subsoils, common in warm humid climates. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Tangipahoa Parish, Louisiana. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map Unit	Acres	Drainage	Hydro Group	Dwellings	Septic
Ruston-Smithdale association, 3 to 12 percent slopes	64K	Well drained	B	Not limited	Somewhat limited
Ouachita, Ochlockonee and Guyton soils, 0 to 3 percent slopes, frequently flooded	62K	Well drained	B	Very limited	Very limited
Maurepas muck, 0 to 1 percent slopes, frequently flooded	57K	Very poorly drained	A/D	Very limited	Very limited
Tangi silt loam, 3 to 8 percent slopes	49K	Moderately well drained	C/D	Very limited	Very limited
Toula silt loam, 1 to 3 percent slopes	43K	Moderately well drained	D	Very limited	Very limited
Guyton silt loam, 0 to 1 percent slopes, rarely flooded	34K	Poorly drained	C/D	Very limited	Very limited
Tangi silt loam, 1 to 3 percent slopes	33K	Moderately well drained	C/D	Very limited	Very limited
Abita silt loam, 0 to 2 percent slopes	32K	Somewhat poorly drained	C	Very limited	Very limited
Water	23K			Not rated	Not rated
Myatt fine sandy loam	17K	Poorly drained	B/D	Very limited	Very limited
Cahaba fine sandy loam, 1 to 3 percent slopes	15K	Well drained	B	Not limited	Very limited
Guyton silt loam, 0 to 1 percent slopes, occasionally flooded	14K	Poorly drained	C/D	Very limited	Very limited
Myatt fine sandy loam, occasionally flooded	14K	Poorly drained	B/D	Very limited	Very limited
Brimstone-Guyton silt loams, 0 to 1 percent slopes, rarely flooded	11K	Poorly drained	C/D	Very limited	Very limited
Ruston fine sandy loam, 1 to 3 percent slopes	9K	Well drained	B	Not limited	Somewhat limited
Fluker silt loam, 0 to 2 percent slopes	8K	Somewhat poorly drained	D	Very limited	Very limited
Abita silt loam, 2 to 5 percent slopes	7K	Somewhat poorly drained	C	Very limited	Very limited
Malbis fine sandy loam, 3 to 8 percent slopes	6K	Moderately well drained	C	Somewhat limited	Very limited
Stough fine sandy loam, 0 to 1 percent slopes	5K	Somewhat poorly drained	C/D	Very limited	Very limited
Savannah silt loam, 1 to 3 percent slopes	5K	Moderately well drained	C/D	Very limited	Very limited

Soil Orders in This Area

The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.

Ultisols

Strongly weathered clay soils of the Southeast. Acidic and naturally low in nutrients. Clay subsoil can slow drainage.

Alfisols

Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

Histosols

Organic peat and muck soils formed in wetlands. Very poor for building (compressible) and septic. Often in regulated wetlands.

Entisols

Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.

What This Means

Building & Foundations

About 77% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 81% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

Gardening & Agriculture

Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.