Greer County, Oklahoma
The most common soil here is Knoco, on about 6% of the land: a clay, sticky when wet and rock-hard when dry. Spur and Hollister come next.
About 87% of the land drains well.
USDA rates 93% of the land very limited for a standard septic drain field, and 45% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 13% of the land floods occasionally or more, and bedrock lies within 40 inches under 26% 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 Greer 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 Inceptisols — young soils with minimal horizon development but more than Entisols. 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 Greer 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 |
|---|---|---|---|---|---|
| Grandmore and Grandfield loamy sands, 0 to 3 percent slopes | 24K | Moderately well drained | B | Somewhat limited | Very limited |
| Hollister silty clay loam, 0 to 1 percent slopes, moist | 21K | Well drained | D | Very limited | Very limited |
| Knoco soils and Rock outcrop, 12 to 40 percent slopes | 21K | Well drained | D | Very limited | Very limited |
| Westill clay loam, 1 to 3 percent slopes | 17K | Well drained | D | Very limited | Very limited |
| Vernon-Knoco complex, cool, 1 to 12 percent slopes | 13K | Well drained | D | Somewhat limited | Very limited |
| Cottonwood-Vinson-Rock outcrop complex, 1 to 8 percent slopes | 13K | Well drained | D | Very limited | Very limited |
| Knoco-Badland complex, dry, 1 to 12 percent slopes | 13K | Well drained | D | Very limited | Very limited |
| Spur clay loam, 0 to 1 percent slopes, occasionally flooded | 12K | Well drained | B | Very limited | Very limited |
| Hardeman-Southside-Arnett complex, 3 to 20 percent slopes | 11K | Well drained | A | Somewhat limited | Very limited |
| Springer and Devol loamy sands, 0 to 3 percent slopes | 11K | Well drained | A | Not limited | Very limited |
| Roark loam, 0 to 1 percent slopes | 10K | Well drained | C | Somewhat limited | Very limited |
| Beckman silty clay, 0 to 1 percent slopes, occasionally flooded | 9K | Moderately well drained | D | Very limited | Very limited |
| Tipton loam, 0 to 1 percent slopes | 8K | Well drained | B | Somewhat limited | Somewhat limited |
| Burford-Spikebox complex, 3 to 12 percent slopes | 8K | Well drained | C | Somewhat limited | Very limited |
| Madge fine sandy loam, 1 to 3 percent slopes | 7K | Well drained | B | Not limited | Very limited |
| Knoco, Rock outcrop, and Cottonwood soils, 2 to 20 percent slopes | 7K | Well drained | D | Very limited | Very limited |
| Eda sand, 3 to 8 percent slopes | 7K | Somewhat excessively drained | A | Not limited | Very limited |
| La Casa silty clay loam, 1 to 3 percent slopes | 7K | Well drained | C | Somewhat limited | Very limited |
| Grandfield loamy sand, 0 to 3 percent slopes | 7K | Well drained | B | Not limited | Very limited |
| Westola fine sandy loam, 0 to 1 percent slopes, occasionally flooded | 6K | Well drained | A | 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 45% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 93% 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.