Soil series profile
Troup soil series
Troup is a somewhat excessively drained soil with a loamy sand surface, mapped on 2,027,278 acres in 110 counties across 6 states. Hydrologic group A.
- Drainage class
- Somewhat excessively drained 97% of mapped acres
- Hydrologic group
- A >99% of mapped acres
- Typical topsoil pH
- 5.3 strongly acidic · range 5.0–5.3
- Mapped area
- 2.0M acres in 110 counties, 6 states
Typical Troup profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–3 in (A) | Loamy sand | 5.3 | 5% | 86% | 1.9% |
| 3–55 in (E) | Loamy sand | 5.3 | 6% | 87% | 0.75% |
| 55–80 in (Bt) | Sandy loam | 5.3 | 15% | 81% | 0.15% |
What this means
What Troup soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Troup soils is strongly acidic: pH 5.3 (most land between 5.0 and 5.3). Most vegetables and lawn grasses do best around 6.0 to 7.0, so lime is often needed; blueberries, azaleas and rhododendrons like it as it is.
Sandy topsoil covers >99% of mapped Troup acres. It drains fast and warms early in spring, but dries out and loses nutrients quickly: mulch, compost and steady watering help. The most common surface texture is sand (44% of mapped Troup acres).
97% of mapped Troup acres is excessively or somewhat excessively drained: water moves through fast, so gardens need more frequent watering in dry spells.
For lawns and yards
>99% of mapped acres is in hydrologic group A, where water soaks in fast. Lawns there dry out quickly; deeper, less frequent watering and organic matter help.
For a septic system
For conventional septic absorption fields, NRCS rates 12% of the acres in mapped Troup soils very limited, 82% somewhat limited and 6% not limited.
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Where Troup soil is found
Mapped acres
Troup is mapped in Georgia, Alabama, Florida, South Carolina, Mississippi and North Carolina. The 60 counties with the most Troup acres:
| County | Acres | Share of county land |
|---|---|---|
| Aiken County, SC | 163,071 | 23.8% |
| Santa Rosa County, FL | 130,096 | 17.9% |
| Conecuh County, AL | 90,492 | 18.8% |
| Escambia County, FL | 76,182 | 18.1% |
| Henry County, AL | 73,514 | 23.8% |
| Okaloosa County, FL | 73,094 | 12.3% |
| Marion County, GA | 68,282 | 29.3% |
| Walton County, FL | 67,641 | 9.3% |
| Escambia County, AL | 61,904 | 11.5% |
| Richmond County, GA | 54,335 | 26.6% |
| Covington County, AL | 53,634 | 9.0% |
| Pike County, AL | 50,336 | 13.3% |
| Jackson County, FL | 44,611 | 7.5% |
| Coffee County, AL | 41,586 | 11.0% |
| Burke County, GA | 40,729 | 8.8% |
| Taylor County, GA | 34,300 | 14.2% |
| Chattahoochee County, GA | 30,143 | 22.8% |
| Orangeburg County, SC | 30,089 | 4.4% |
| Calhoun County, SC | 29,771 | 12.9% |
| Russell County, AL | 29,648 | 8.2% |
| Houston County, AL | 27,961 | 8.6% |
| Webster County, GA | 26,863 | 23.5% |
| Laurens County, GA | 24,610 | 5.5% |
| Butler County, AL | 21,944 | 5.0% |
| Crawford County, GA | 21,810 | 10.6% |
| Jefferson County, GA | 21,678 | 7.4% |
| Geneva County, AL | 21,576 | 6.7% |
| Dallas County, AL | 21,209 | 4.0% |
| Mitchell County, GA | 20,387 | 7.3% |
| Lexington County, SC | 18,633 | 4.2% |
| Lee County, GA | 17,570 | 8.5% |
| Stewart County, GA | 16,886 | 6.6% |
| Sumter County, AL | 16,689 | 3.4% |
| Jenkins County, GA | 15,492 | 7.8% |
| Glascock County, GA | 15,465 | 18.9% |
| Seminole County, GA | 15,272 | 11.3% |
| Crenshaw County, AL | 15,009 | 4.3% |
| Kershaw County, SC | 14,560 | 3.1% |
| Talbot County, GA | 14,441 | 5.9% |
| Muscogee County, GA | 14,350 | 10.6% |
| Jeff Davis County, GA | 14,184 | 6.7% |
| McDuffie County, GA | 14,090 | 8.6% |
| Baker County, GA | 13,833 | 7.3% |
| Clarendon County, SC | 13,502 | 3.5% |
| Jasper County, MS | 12,901 | 3.1% |
| Holmes County, FL | 12,894 | 4.2% |
| Calhoun County, FL | 12,782 | 3.5% |
| Sumter County, SC | 12,480 | 3.0% |
| Wheeler County, GA | 11,708 | 6.8% |
| Leon County, FL | 11,538 | 2.7% |
| Wayne County, NC | 11,162 | 3.4% |
| Appling County, GA | 10,763 | 3.3% |
| Johnson County, GA | 10,325 | 6.2% |
| Toombs County, GA | 10,012 | 4.8% |
| Decatur County, GA | 9,753 | 3.1% |
| Terrell County, GA | 9,580 | 4.8% |
| Elmore County, AL | 9,255 | 2.6% |
| Madison County, FL | 9,091 | 2.0% |
| Warren County, GA | 8,970 | 5.0% |
| Chesterfield County, SC | 8,711 | 1.8% |
Septic absorption fields
NRCS rating, share of Troup acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 5.6% |
| Somewhat limited | 82.4% |
| Very limited | 11.9% |
| Not rated | 0.2% |
Drainage, water table and flooding
Share of Troup acres
- Depth to seasonal high water table
- None reported within about 6.5 feet (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 3–17% (median 4%).
- Topsoil organic matter
- Median 0.8%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 96.6% |
| Well drained | 3.2% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
| Not rated | 0.2% |
Hydrologic soil group
Show as a table
| Category | Share of acres |
|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 99.8% |
| B: moderate infiltration | 0.0% |
| C: slow infiltration | 0.0% |
| D: very slow infiltration (clayey, shallow or wet) | 0.0% |
| A/D: D as is, A if drained | 0.0% |
| B/D: D as is, B if drained | 0.0% |
| C/D: D as is, C if drained | 0.0% |
| Not rated | 0.2% |
Sources & data dates
- Source
- USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
- Data date
- SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
- Scope
- All map unit components named Troup (component kind "Series") in SSURGO: 2,027,278 acres.
- Method
- Shares are by mapped acres of Troup components. The profile comes from the single largest Troup component. Full methodology.