Greene and Washington Counties, Pennsylvania
The dominant drainage class is Moderately well drained and the dominant hydrologic group is D (very slow infiltration, high 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 Greene and Washington Counties, Pennsylvania.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Dormont-Culleoka complex, 25 to 50 percent slopes | 288K | Moderately well drained | D | Very limited | Very limited |
| Dormont-Culleoka complex, 15 to 25 percent slopes | 146K | Moderately well drained | D | Very limited | Very limited |
| Dormont silt loam, 8 to 15 percent slopes | 88K | Moderately well drained | D | Somewhat limited | Very limited |
| Dormont silt loam, 15 to 25 percent slopes | 48K | Moderately well drained | D | Very limited | Very limited |
| Culleoka channery silt loam, 15 to 25 percent slopes | 41K | Well drained | B | Very limited | Very limited |
| Culleoka channery silt loam, 8 to 15 percent slopes | 26K | Well drained | B | Very limited | Very limited |
| Fluvaquents, loamy | 25K | Poorly drained | B/D | Very limited | Very limited |
| Guernsey silt loam, 8 to 15 percent slopes | 25K | Moderately well drained | C/D | Very limited | Very limited |
| Newark silt loam, 0 to 3 percent slopes, frequently flooded | 25K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Weikert-Culleoka complex, 15 to 25 percent slopes | 23K | Somewhat excessively drained | D | Very limited | Very limited |
| Dormont silt loam, 3 to 8 percent slopes | 18K | Moderately well drained | D | Somewhat limited | Very limited |
| Culleoka channery silt loam, 3 to 8 percent slopes | 17K | Well drained | B | Very limited | Very limited |
| Glenford silt loam, 3 to 8 percent slopes | 17K | Moderately well drained | C/D | Very limited | Very limited |
| Weikert-Culleoka complex, 3 to 8 percent slopes | 15K | Somewhat excessively drained | D | Very limited | Very limited |
| Guernsey silt loam, 15 to 25 percent slopes | 13K | Moderately well drained | C/D | Very limited | Very limited |
| Weikert-Culleoka complex, 8 to 15 percent slopes | 12K | Somewhat excessively drained | D | Very limited | Very limited |
| Guernsey silt loam, 3 to 8 percent slopes | 11K | Moderately well drained | C/D | Very limited | Very limited |
| Udorthents, strip mine, steep | 10K | Well drained | C | Very limited | Very limited |
| Udorthents, strip mine, moderately steep | 7K | Well drained | C | Somewhat limited | Very limited |
| Huntington silt loam | 7K | Well drained | B | Very limited | Very limited |
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 100% 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.