Warren County, New Jersey

Survey Area NJ041• New Jersey

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 Inceptisols — young soils with minimal horizon development but more than Entisols. 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, New Jersey. 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
Washington silt loam, 3 to 8 percent slopes	19K	Well drained	B	Not limited	Very limited
Nassau-Manlius very channery silt loams, 15 to 35 percent slopes, rocky	10K	Somewhat excessively drained	D	Very limited	Very limited
Rock outcrop-Farmington-Galway complex, 15 to 35 percent slopes	10K	Well drained	D	Very limited	Very limited
Hazen-Paulins Kill complex, 3 to 8 percent slopes, very stony	9K	Well drained	A	Not limited	Very limited
Nassau-Manlius very channery silt loams, 8 to 15 percent slopes, rocky	9K	Somewhat excessively drained	D	Very limited	Very limited
Parker-Rock outcrop complex, 45 to 65 percent slopes	7K	Somewhat excessively drained	B	Very limited	Very limited
Annandale gravelly loam, 8 to 15 percent slopes	7K	Well drained	C	Somewhat limited	Somewhat limited
Fredon-Halsey complex, 0 to 3 percent slopes, very stony	7K	Somewhat poorly drained	B/D	Very limited	Very limited
Netcong loam, 8 to 15 percent slopes, very stony	6K	Well drained	B	Somewhat limited	Very limited
Udorthents-Urban land complex, 0 to 8 percent slopes	6K	Well drained	D	Not limited	Very limited
Paulins Kill-Hazen complex, 8 to 15 percent slopes, very stony	6K	Well drained	A	Somewhat limited	Very limited
Wurtsboro-Swartswood complex, 8 to 15 percent slopes, extremely stony	5K	Moderately well drained	C	Very limited	Very limited
Annandale gravelly loam, 3 to 8 percent slopes	5K	Well drained	C	Not limited	Somewhat limited
Rock outcrop-Farmington-Galway complex, 8 to 15 percent slopes	5K	Well drained	D	Very limited	Very limited
Washington silt loam, 8 to 15 percent slopes	5K	Well drained	B	Somewhat limited	Very limited
Hazen-Paulins Kill complex, 0 to 3 percent slopes, very stony	5K	Well drained	A	Not limited	Very limited
Water	5K			Not rated	Not rated
Chatfield-Hollis-Rock outcrop complex, New Jersey Highlands, 35 to 60 percent slopes	5K	Well drained	D	Very limited	Very limited
Parker gravelly sandy loam, 15 to 25 percent slopes	4K	Somewhat excessively drained	B	Very limited	Very limited
Bartley loam, 3 to 8 percent slopes	4K	Moderately well drained	C	Somewhat 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.

Inceptisols

Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

Ultisols

Strongly weathered clay soils of the Southeast. Acidic and naturally low in nutrients. Clay subsoil can slow drainage.

Alfisols

Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

What This Means

Building & Foundations

About 44% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

Septic Systems

About 87% 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.