Pittsburg County, Oklahoma
The most common soil here is Bengal, on about 21% of the land: a stony loam, a balanced mix that crumbles in your hand. Clebit and Clearview come next.
About 55% of the land drains well, and 19% stays wet for long stretches; groundwater comes within two feet of the surface under 30% of it.
USDA rates 95% of the land very limited for a standard septic drain field, and 86% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 10% of the land floods occasionally or more, and bedrock lies within 40 inches under 68% of it.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Pittsburg County, Oklahoma, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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 Pittsburg County, Oklahoma. 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 |
|---|---|---|---|---|---|
| Bengal-Clebit-Clearview complex, 5 to 30 percent slopes | 303K | Well drained | D | Very limited | Very limited |
| Talihina-Eram-Collinsville complex, 5 to 20 percent slopes | 77K | Moderately well drained | D | Very limited | Very limited |
| Bengal-Clebit-Rock outcrop complex, 30 to 60 percent slopes | 61K | Well drained | D | Very limited | Very limited |
| Rexor and Verdigris soils, 0 to 1 percent slopes, frequently flooded | 47K | Moderately well drained | B | Very limited | Very limited |
| Water | 44K | D | Not rated | Not rated | |
| Dennis-Pharoah-Eram complex, 3 to 5 percent slopes, severely eroded | 23K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Dennis loam, 3 to 5 percent slopes, eroded | 21K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Clebit-Clearview complex, 3 to 5 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Dennis loam, 1 to 3 percent slopes | 20K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Clearview fine sandy loam, 3 to 5 percent slopes, eroded | 18K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Clebit-Clearview complex, 3 to 8 percent slopes, severely eroded | 16K | Well drained | D | Very limited | Very limited |
| Parsons silt loam, 0 to 1 percent slopes | 16K | Somewhat poorly drained | D | Very limited | Very limited |
| Karma loamy fine sand, 3 to 8 percent slopes, severely eroded | 15K | Well drained | B | Not limited | Very limited |
| Cupco silt loam, 0 to 1 percent slopes, occasionally flooded | 13K | Very poorly drained | C/D | Very limited | Very limited |
| Bates-Coweta complex, 3 to 5 percent slopes | 11K | Well drained | C | Somewhat limited | Very limited |
| Larton loamy fine sand, 3 to 8 percent slopes | 11K | Well drained | A | Not limited | Very limited |
| Rexor silt loam, 0 to 1 percent slopes, occasionally flooded | 10K | Moderately well drained | B | Very limited | Very limited |
| Eram clay loam, 3 to 5 percent slopes | 9K | Moderately well drained | D | Very limited | Very limited |
| Endsaw-Hector-Clearview complex, 1 to 15 percent slopes, extremely stony | 9K | Moderately well drained | D | Very limited | Very limited |
| Parsons silt loam, 1 to 3 percent slopes | 8K | Somewhat poorly drained | 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.
What This Means
Building & Foundations
About 86% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 95% 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
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.