Berkshire County, Massachusetts
The dominant drainage class is 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 Berkshire County, Massachusetts.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Lyman-Tunbridge association, 15 to 60 percent slopes, extremely stony | 98K | Well drained | D | Very limited | Very limited |
| Peru-Marlow association, 3 to 15 percent slopes, extremely stony | 90K | Moderately well drained | C/D | Very limited | Very limited |
| Tunbridge-Lyman association, 3 to 15 percent slopes, extremely stony | 51K | Well drained | C | Very limited | Very limited |
| Pillsbury fine sandy loam, 0 to 8 percent slopes, very stony | 47K | Poorly drained | D | Very limited | Very limited |
| Berkshire-Marlow association, 15 to 45 percent slopes, extremely stony | 45K | Well drained | B | Very limited | Very limited |
| Taconic-Macomber association, steep, very stony | 37K | Somewhat excessively drained | D | Very limited | Very limited |
| Farmington-Rock outcrop complex, 15 to 35 percent slopes | 14K | Well drained | D | Very limited | Very limited |
| Amenia silt loam, 3 to 8 percent slopes | 13K | Moderately well drained | C | Very limited | Very limited |
| Taconic-Macomber association, rolling, very stony | 12K | Somewhat excessively drained | D | Very limited | Very limited |
| Cwater | 12K | Not rated | Not rated | ||
| Farmington loam, 3 to 15 percent slopes, rocky | 10K | Well drained | D | Very limited | Very limited |
| Fullam-Lanesboro association, rolling, very stony | 9K | Moderately well drained | C | Very limited | Very limited |
| Lanesboro-Dummerston association, steep, very stony | 8K | Well drained | C | Very limited | Very limited |
| Natchaug and Catden mucks, 0 to 2 percent slopes | 7K | Very poorly drained | B/D | Very limited | Very limited |
| Limerick silt loam, 0 to 3 percent slopes, frequently flooded | 6K | Poorly drained | B/D | Very limited | Very limited |
| Amenia silt loam, 8 to 15 percent slopes | 6K | Moderately well drained | C | Very limited | Very limited |
| Fredon fine sandy loam, 0 to 3 percent slopes | 6K | Poorly drained | B/D | Very limited | Very limited |
| Copake fine sandy loam, 3 to 8 percent slopes | 5K | Well drained | A | Not limited | Very limited |
| Pittsfield-Urban land complex, 0 to 15 percent slopes | 5K | Well drained | A | Not limited | Very limited |
| Kendaia silt loam, 3 to 8 percent slopes | 5K | Poorly 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, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 97% 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.