USDA SSURGO COUNTY SOIL REFERENCE

New Castle County, Delaware Soil Summary

This page summarizes USDA SSURGO mapped soil information for New Castle County, Delaware.

Mapped Land Coverage
100%316,177.21 mapped acres of 316,177.2 Census land acres

Coverage measures mapped SSURGO intersection with Census land geometry. It does not mean that every parcel or point has complete soil information.

Soil at a Glance

Largest mapped soil unit
Water
Symbol: W15% of mapped area
Largest estimated component
Water
47,573.27 acres (15.05% of mapped area)
Mapped units & components
15 soil units • 15 component series
Distinct SSURGO map units & series
Dominant drainage class
Well drained
Highest acreage drainage class
Dominant hydrologic group
Group Unknown / Unmapped
Runoff potential classification
Weighted average slope
3.9%
Terrain slope analysis
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County summaries provide regional context across mapped soil units. Address lookup combines available public datasets for the Census-matched location.

Mapped SSURGO Soil Units

Largest mapped soil units in New Castle County ranked by intersected vector acreage
SymbolMap Unit NameMapped Acres% of Mapped Area
WWater47,426.5815%
ReBReybold silt loam, 2 to 5 percent slopes25,114.937.94%
UpUrban land11,661.753.69%
ImBIngleside-Hammonton-Fallsington complex, 0 to 5 percent slopes9,493.83%
TdBTalleyville-Montalto-Urban land complex, 0 to 8 percent slopes8,812.872.79%
BrmBroadkill mucky silt loam, 0 to 1 percent slopes, very frequently flooded, tidal8,619.832.73%
MuBMattapex-Urban land complex, 0 to 5 percent slopes7,792.532.46%
GhBGlenelg-Wheaton-Urban land complex, 0 to 8 percent slopes7,582.532.4%
GeBGlenelg loam, 3 to 8 percent slopes7,289.792.31%
ErBElsinboro-Delanco-Urban land complex, 0 to 8 percent slopes6,932.352.19%
HoAHammonton-Fallsington-Mullica complex, 0 to 2 percent slopes5,497.31.74%
ReCReybold silt loam, 5 to 10 percent slopes5,332.911.69%
RdAReybold-Queponco complex, 0 to 2 percent slopes5,178.051.64%
GeCGlenelg loam, 8 to 15 percent slopes4,470.61.41%
FgcAFallsington loams, 0 to 2 percent slopes, Mid-Altlantic Coastal Plain4,253.171.35%

Estimated Soil Components

Component acreage estimated from SSURGO component percentages
ComponentDrainage ClassHydrologic GroupEstimated Acres% of Mapped Area
WaterUnspecifiedUnspecified47,573.2715.05%
ReyboldWell drainedB29,132.279.21%
Urban landUnspecifiedUnspecified27,352.658.65%
GlenelgWell drainedB, C16,133.145.1%
UdorthentsWell drained, Moderately well drainedA, C14,217.164.5%
FallsingtonPoorly drainedC/D, B/D13,320.814.21%
SassafrasWell drainedB10,941.413.46%
MattapexModerately well drainedC9,550.933.02%
HammontonModerately well drainedB7,624.32.41%
BroadkillVery poorly drainedB/D7,577.592.4%
WoodstownModerately well drainedC7,076.312.24%
InglesideWell drainedA, B6,156.651.95%
LeipsicModerately well drainedC5,817.031.84%
OthelloPoorly drainedC/D5,657.041.79%
NeshaminyWell drainedB, C, D5,229.551.65%
Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Drainage Class Distribution

Well drained37.92%
119,887.33 acres
Unknown / Unmapped30.54%
96,567.46 acres
Moderately well drained14.07%
44,473.55 acres
Poorly drained9.68%
30,605.92 acres
Very poorly drained6.85%
21,666.41 acres
Somewhat poorly drained0.7%
2,203.19 acres
Somewhat excessively drained0.18%
575.43 acres
Excessively drained0.05%
145.1 acres

Hydrologic Soil Group Distribution

Group Unknown / Unmapped30.45%
96,268.04 acres
Group B28.63%
90,535.89 acres
Group C16.44%
51,986.67 acres
Group C/D8.69%
27,476.79 acres
Group B/D7.54%
23,843.06 acres
Group A5.4%
17,060.49 acres
Group D1.87%
5,926.86 acres
Group A/D0.96%
3,026.59 acres

Hydrologic soil groups are USDA/NRCS classifications related to runoff potential under specified soil conditions. They are not a property-level flood-risk rating.

Slope Characteristics

Weighted Average Slope: 3.9%
Nearly Level (0-2%)32.98%
104,263.25 acres
Gently Sloping (2-8%)38.1%
120,452.19 acres
Moderately Sloping (8-15%)3.74%
11,837.09 acres
Steep (15-30%)2.62%
8,284.19 acres
Very Steep (>30%)0.76%
2,390.26 acres
Unspecified Slope21.79%
68,897.41 acres

Sources & Methodology

USDA NRCS SSURGO

Mapped soil units, components, drainage classes, hydrologic groups, and slope ratings derived from official Soil Data Access REST services.

U.S. Census Bureau TIGER/Line

County land geometry used for county-level coverage calculation.

Coverage Method

Mapped acreage is calculated from true spatial vector intersection of county land geometry and SSURGO mapped soil polygons using NAD83 / CONUS Albers Equal Area projection (EPSG:5070).