Warren County, Pennsylvania
The most common soil here is Hazleton, on about 16% of the land: a sandy loam, gritty and crumbly. Venango and Cookport come next.
About 33% of the land drains well, and 33% stays wet for long stretches; groundwater comes within two feet of the surface under 65% of it.
USDA rates 98% of the land very limited for a standard septic drain field, and 91% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 4% of the land floods occasionally or more, and bedrock lies within 40 inches under 12% of it.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Warren County, Pennsylvania, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). The most common soil order is Ultisols — strongly weathered soils with clay-enriched subsoils, common in warm humid climates. 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 Warren County, Pennsylvania. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Cookport silt loam, 0 to 15 percent slopes, extremely stony | 36K | Moderately well drained | C/D | Very limited | Very limited |
| Hazleton channery sandy loam, 8 to 25 percent slopes, extremely stony | 36K | Well drained | A | Very limited | Very limited |
| Hazleton channery sandy loam, 25 to 80 percent slopes, extremely stony | 36K | Well drained | A | Very limited | Very limited |
| Buchanan silt loam, 8 to 25 percent slopes, extremely stony | 31K | Moderately well drained | C/D | Very limited | Very limited |
| Venango silt loam, 3 to 8 percent slopes | 31K | Somewhat poorly drained | D | Very limited | Very limited |
| Gilpin channery silt loam, 35 to 65 percent slopes | 26K | Well drained | C | Very limited | Very limited |
| Venango silt loam, 8 to 15 percent slopes | 20K | Somewhat poorly drained | D | Very limited | Very limited |
| Alvira silt loam, 8 to 15 percent slopes | 18K | Somewhat poorly drained | D | Very limited | Very limited |
| Hazleton channery sandy loam, 0 to 8 percent slopes, extremely stony | 18K | Well drained | A | Somewhat limited | Very limited |
| Lordstown soils, 25 to 70 percent slopes | 16K | Well drained | C | Very limited | Very limited |
| Hanover silt loam, 15 to 25 percent slopes | 15K | Moderately well drained | C/D | Very limited | Very limited |
| Wayland silt loam | 14K | Poorly drained | C/D | Very limited | Very limited |
| Mardin gravelly silt loam, 8 to 15 percent slopes | 13K | Moderately well drained | D | Very limited | Very limited |
| Alvira silt loam, 0 to 15 percent slopes, extremely stony | 13K | Somewhat poorly drained | D | Very limited | Very limited |
| Alvira silt loam, 3 to 8 percent slopes | 13K | Somewhat poorly drained | D | Very limited | Very limited |
| Mardin gravelly silt loam, 15 to 25 percent slopes | 12K | Moderately well drained | D | Very limited | Very limited |
| Cavode silt loam, 0 to 25 percent slopes, extremely stony | 11K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Cavode silt loam, 8 to 15 percent slopes | 10K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Water | 10K | Not rated | Not rated | ||
| Mardin gravelly silt loam, 3 to 8 percent slopes | 10K | Moderately well drained | D | Very limited | Very limited |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 91% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 98% 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.