Sullivan County, New York
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 Sullivan County, New York.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Wellsboro and Wurtsboro soils, strongly sloping, extremely stony | 89K | Moderately well drained | D | Very limited | Very limited |
| Wellsboro gravelly loam, 3 to 8 percent slopes | 39K | Moderately well drained | D | Very limited | Very limited |
| Wellsboro gravelly loam, 8 to 15 percent slopes | 24K | Moderately well drained | D | Very limited | Very limited |
| Swartswood and Lackawanna soils, steep, extremely stony | 21K | Well drained | C/D | Very limited | Very limited |
| Arnot-Lordstown complex, 0 to 15 percent slopes, very rocky | 21K | Well drained | D | Very limited | Very limited |
| Water | 20K | Not rated | Not rated | ||
| Arnot-Oquaga complex, 0 to 15 percent slopes, very rocky | 20K | Somewhat excessively drained | D | Very limited | Very limited |
| Wurtsboro loam, 3 to 8 pecent slopes, stony | 17K | Moderately well drained | C/D | Very limited | Very limited |
| Arnot-Lordstown complex, 15 to 35 percent slopes, very rocky | 17K | Well drained | D | Very limited | Very limited |
| Arnot-Oquaga complex, 15 to 35 percent slopes, very rocky | 17K | Somewhat excessively drained | D | Very limited | Very limited |
| Willowemoc silt loam, strongly sloping, very stony | 16K | Moderately well drained | C/D | Very limited | Very limited |
| Hawksnest-Mongaup loams, strongly sloping, very rocky | 14K | Somewhat excessively drained | D | Very limited | Very limited |
| Willowemoc silt loam, 3 to 8 percent slopes | 13K | Moderately well drained | C/D | Very limited | Very limited |
| Oquaga very channery silt loam, 3 to 8 percent slopes | 13K | Well drained | C | Very limited | Very limited |
| Arnot-Rock outcrop complex, 35 to 70 percent slopes | 13K | Somewhat excessively drained | D | Very limited | Very limited |
| Hawksnest-Mongaup loams, steep, very rocky | 12K | Somewhat excessively drained | D | Very limited | Very limited |
| Willowemoc silt loam, 8 to 15 percent slopes | 11K | Moderately well drained | C/D | Very limited | Very limited |
| Oquaga-Arnot complex, 8 to 15 percent slopes | 11K | Well drained | C | Very limited | Very limited |
| Scriba and Morris loams, gently sloping, rubbly | 10K | Somewhat poorly drained | D | Very limited | Very limited |
| Swartswood gravelly loam, 3 to 8 percent slopes, stony | 8K | Well drained | C/D | Very limited | Very limited |
What This Means
Building & Foundations
About 95% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas. A geotechnical assessment is recommended before building.
Septic Systems
About 95% 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.