Soil series profile
Ocilla soil series
Ocilla is a somewhat poorly drained soil with a loamy fine sand surface, mapped on 446,415 acres in 97 counties across 6 states. Hydrologic group B/D.
- Drainage class
- Somewhat poorly drained 97% of mapped acres
- Hydrologic group
- B/D 63% of mapped acres
- Typical topsoil pH
- 5.0 very strongly acidic · range 5.0–5.5
- Mapped area
- 446k acres in 97 counties, 6 states
Typical Ocilla profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–28 in (H1) | Loamy fine sand | 5.0 | 7% | 86% | 1.5% |
| 28–59 in (H2) | Sandy clay loam | 5.0 | 25% | 57% | 0.25% |
| 59–67 in (H3) | Sandy clay loam | 5.0 | 28% | 55% | 0.25% |

What this means
What Ocilla soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Ocilla soils is very strongly acidic: pH 5.0 (most land between 5.0 and 5.5). 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 100% of mapped Ocilla 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 loamy sand (43% of mapped Ocilla acres).
97% of mapped Ocilla acres is somewhat poorly to very poorly drained, so soil stays soggy for long spells after rain and in wet seasons. Raised beds, plants that tolerate wet feet, and not working the soil while wet all help.
For lawns and yards
On 99% of mapped acres, rain soaks in slowly (hydrologic groups C and D, including dual groups that are D until drained). Expect runoff and puddles after heavy rain: core-aerate compacted lawns and keep ground sloping away from foundations.
For a septic system
For conventional septic absorption fields, NRCS rates 99% of the acres in mapped Ocilla soils very limited, 1% somewhat limited and 0% not limited.
Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.
Flooding is mapped on 9% of the acres (3% occasional, 2% frequent).
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Where Ocilla soil is found
Mapped acres
Ocilla is mapped in Georgia, South Carolina, Florida, Alabama, North Carolina and Mississippi. The 60 counties with the most Ocilla acres:
| County | Acres | Share of county land |
|---|---|---|
| Colleton County, SC | 28,897 | 4.9% |
| Hampton County, SC | 22,420 | 6.4% |
| Liberty County, GA | 21,207 | 6.5% |
| Chatham County, GA | 19,025 | 7.0% |
| Berkeley County, SC | 16,503 | 2.4% |
| Pitt County, NC | 16,214 | 4.3% |
| Madison County, FL | 15,671 | 3.5% |
| Jasper County, SC | 15,029 | 3.7% |
| Bryan County, GA | 13,571 | 4.9% |
| Baker County, FL | 12,725 | 3.4% |
| Irwin County, GA | 11,330 | 5.7% |
| Orangeburg County, SC | 10,262 | 1.5% |
| Allendale County, SC | 8,581 | 2.3% |
| Washington County, FL | 6,924 | 1.8% |
| Emanuel County, GA | 6,920 | 1.8% |
| Decatur County, GA | 6,906 | 2.2% |
| Bullock County, AL | 6,899 | 2.0% |
| Dorchester County, SC | 6,715 | 1.9% |
| Tift County, GA | 6,237 | 4.1% |
| McIntosh County, GA | 6,179 | 2.3% |
| Grady County, GA | 6,004 | 2.5% |
| Barbour County, AL | 5,933 | 1.2% |
| Colquitt County, GA | 5,648 | 1.9% |
| Bamberg County, SC | 5,522 | 2.4% |
| Long County, GA | 5,501 | 2.2% |
| Wheeler County, GA | 5,464 | 3.2% |
| Seminole County, GA | 5,380 | 4.0% |
| Jackson County, MS | 4,927 | 1.2% |
| Jenkins County, GA | 4,916 | 2.5% |
| Screven County, GA | 4,864 | 1.4% |
| Ben Hill County, GA | 4,749 | 3.4% |
| Clarendon County, SC | 4,707 | 1.2% |
| Miller County, GA | 4,688 | 2.9% |
| Harrison County, MS | 4,629 | 1.2% |
| Union County, FL | 4,556 | 2.9% |
| Worth County, GA | 4,520 | 1.4% |
| Laurens County, GA | 4,496 | 1.0% |
| Bladen County, NC | 4,357 | 0.9% |
| Leon County, FL | 4,322 | 1.0% |
| Early County, GA | 4,076 | 1.4% |
| Appling County, GA | 3,831 | 1.2% |
| Jeff Davis County, GA | 3,831 | 1.8% |
| Clay County, FL | 3,747 | 1.0% |
| Hamilton County, FL | 3,700 | 1.1% |
| Macon County, AL | 3,612 | 1.1% |
| Suwannee County, FL | 3,547 | 0.8% |
| Russell County, AL | 3,392 | 0.9% |
| Washington County, GA | 3,360 | 0.9% |
| Brooks County, GA | 3,260 | 1.2% |
| Thomas County, GA | 3,132 | 1.1% |
| Nassau County, FL | 3,096 | 0.8% |
| Bradford County, FL | 3,004 | 1.6% |
| Burke County, GA | 2,961 | 0.6% |
| Crenshaw County, AL | 2,782 | 0.8% |
| Gulf County, FL | 2,759 | 0.7% |
| Jefferson County, GA | 2,754 | 0.9% |
| Houston County, AL | 2,482 | 0.8% |
| Toombs County, GA | 2,388 | 1.1% |
| Lee County, GA | 2,252 | 1.1% |
| Gadsden County, FL | 2,195 | 0.7% |
Septic absorption fields
NRCS rating, share of Ocilla acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 1.3% |
| Very limited | 98.7% |
Drainage, water table and flooding
Share of Ocilla acres
- Depth to seasonal high water table
- About 1.7 feet (20 in) (median where reported); within 18 inches on 18% of acres.
- Flooding
- Mapped as flooding on 9% of acres (3% occasional, 2% frequent).
- Slope
- Typically 1–3% (median 1%).
- Topsoil organic matter
- Median 1.5%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 0.0% |
| Moderately well drained | 3.3% |
| Somewhat poorly drained | 96.7% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
Hydrologic soil group
Show as a table
| Category | Share of acres |
|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 0.0% |
| B: moderate infiltration | 1.3% |
| C: slow infiltration | 0.2% |
| D: very slow infiltration (clayey, shallow or wet) | 0.0% |
| A/D: D as is, A if drained | 35.8% |
| B/D: D as is, B if drained | 62.6% |
| C/D: D as is, C if drained | 0.1% |
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 Ocilla (component kind "Series") in SSURGO: 446,415 acres.
- Method
- Shares are by mapped acres of Ocilla components. The profile comes from the single largest Ocilla component. Full methodology.