Johnston County, North Carolina
The dominant drainage class is Well drained and the dominant hydrologic group is A (high infiltration, low runoff). 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 Johnston County, North Carolina.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Rains sandy loam, 0 to 2 percent slopes | 36K | Poorly drained | A/D | Very limited | Very limited |
| Norfolk loamy sand, 0 to 2 percent slopes | 33K | Well drained | A | Somewhat limited | Somewhat limited |
| Goldsboro sandy loam, 0 to 2 percent slopes | 31K | Moderately well drained | B | Very limited | Very limited |
| Gilead sandy loam, 2 to 8 percent slopes | 30K | Moderately well drained | C | Very limited | Very limited |
| Bibb sandy loam, 0 to 2 percent slopes, frequently flooded | 29K | Poorly drained | A/D | Very limited | Very limited |
| Norfolk loamy sand, 2 to 6 percent slopes | 26K | Well drained | A | Somewhat limited | Somewhat limited |
| Wehadkee loam, 0 to 2 percent slopes, frequently flooded | 21K | Poorly drained | B/D | Very limited | Very limited |
| Gilead sandy loam, 8 to 15 percent slopes | 19K | Moderately well drained | C | Very limited | Very limited |
| Lynchburg sandy loam, 0 to 2 percent slopes | 16K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Wagram loamy sand, 0 to 6 percent slopes | 15K | Well drained | A | Not limited | Somewhat limited |
| Wehadkee-Chastain association, 0 to 2 percent slopes, frequently flooded | 12K | Poorly drained | B/D | Very limited | Very limited |
| Uchee loamy coarse sand, 2 to 6 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
| Wedowee sandy loam, 2 to 8 percent slopes | 12K | Well drained | B | Not limited | Somewhat limited |
| Cecil loam, 2 to 6 percent slopes | 12K | Well drained | A | Not limited | Somewhat limited |
| Marlboro-Cecil complex, 2 to 8 percent slopes | 11K | Well drained | B | Somewhat limited | Somewhat limited |
| Wedowee sandy loam, 8 to 15 percent slopes | 10K | Well drained | B | Somewhat limited | Somewhat limited |
| Marlboro sandy loam, 2 to 8 percent slopes | 9K | Well drained | B | Somewhat limited | Somewhat limited |
| Pacolet loam, 10 to 15 percent slopes | 9K | Well drained | B | Somewhat limited | Somewhat limited |
| Blanton sand, 0 to 3 percent slopes | 9K | Moderately well drained | A | Somewhat limited | Somewhat limited |
| Altavista fine sandy loam, 0 to 2 percent slopes, occasionally flooded | 8K | Moderately well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 56% 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 59% 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.