USDA SSURGO COUNTY SOIL REFERENCE

DuPage County, Illinois Soil Summary

This page summarizes USDA SSURGO mapped soil information for DuPage County, Illinois.

Mapped Land Coverage

100%215,288.73 mapped acres of 215,288.73 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

Orthents, clayey, undulating

Symbol: 805B • 14.53% of mapped area

Largest estimated component

Orthents

35,598.91 acres (16.54% of mapped area)

Mapped units & components

145 mapped soil units

Top 15 shown below · 62 component series

Dominant drainage class

Moderately well drained

Highest acreage drainage class

Dominant hydrologic group

Group C

Runoff potential classification

Weighted average slope

2.42%

Terrain slope analysis

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Top Mapped Soil Units

Showing the 15 largest mapped units, representing 77.51% of mapped soil area.

Symbol	Map Unit Name	Mapped Acres	% of Mapped Area
805B	Orthents, clayey, undulating	31,281.88	14.53%
854B	Markham-Ashkum-Beecher complex, 1 to 6 percent slopes	30,716.87	14.27%
232A	Ashkum silty clay loam, 0 to 2 percent slopes	15,489.98	7.19%
531B	Markham silt loam, 2 to 4 percent slopes	15,106.26	7.02%
152A	Drummer silty clay loam, 0 to 2 percent slopes	11,655.65	5.41%
146A	Elliott silt loam, 0 to 2 percent slopes	9,228.14	4.29%
530B	Ozaukee silt loam, 2 to 4 percent slopes	8,549.51	3.97%
530C2	Ozaukee silt loam, 4 to 6 percent slopes, eroded	7,577.43	3.52%
223B	Varna silt loam, 2 to 4 percent slopes	7,396.46	3.44%
531C2	Markham silt loam, 4 to 6 percent slopes, eroded	6,906.41	3.21%
802B	Orthents, loamy, 1 to 6 percent slopes	5,737.93	2.67%
3107A	Sawmill silty clay loam, heavy till plain, 0 to 2 percent slopes, frequently flooded	4,872.13	2.26%
W	Water	4,376.86	2.03%
614A	Chenoa silty clay loam, 0 to 2 percent slopes	4,044.41	1.88%
330A	Peotone silty clay loam, 0 to 2 percent slopes	3,920.63	1.82%

805B14.53% of mapped area

Orthents, clayey, undulating

Mapped Area31,281.88 acres

Rank#1 of 145 in county

854B14.27% of mapped area

Markham-Ashkum-Beecher complex, 1 to 6 percent slopes

Mapped Area30,716.87 acres

Rank#2 of 145 in county

232A7.19% of mapped area

Ashkum silty clay loam, 0 to 2 percent slopes

Mapped Area15,489.98 acres

Rank#3 of 145 in county

531B7.02% of mapped area

Markham silt loam, 2 to 4 percent slopes

Mapped Area15,106.26 acres

Rank#4 of 145 in county

152A5.41% of mapped area

Drummer silty clay loam, 0 to 2 percent slopes

Mapped Area11,655.65 acres

Rank#5 of 145 in county

146A4.29% of mapped area

Elliott silt loam, 0 to 2 percent slopes

Mapped Area9,228.14 acres

Rank#6 of 145 in county

530B3.97% of mapped area

Ozaukee silt loam, 2 to 4 percent slopes

Mapped Area8,549.51 acres

Rank#7 of 145 in county

530C23.52% of mapped area

Ozaukee silt loam, 4 to 6 percent slopes, eroded

Mapped Area7,577.43 acres

Rank#8 of 145 in county

223B3.44% of mapped area

Varna silt loam, 2 to 4 percent slopes

Mapped Area7,396.46 acres

Rank#9 of 145 in county

531C23.21% of mapped area

Markham silt loam, 4 to 6 percent slopes, eroded

Mapped Area6,906.41 acres

Rank#10 of 145 in county

802B2.67% of mapped area

Orthents, loamy, 1 to 6 percent slopes

Mapped Area5,737.93 acres

Rank#11 of 145 in county

3107A2.26% of mapped area

Sawmill silty clay loam, heavy till plain, 0 to 2 percent slopes, frequently flooded

Mapped Area4,872.13 acres

Rank#12 of 145 in county

W2.03% of mapped area

Water

Mapped Area4,376.86 acres

Rank#13 of 145 in county

614A1.88% of mapped area

Chenoa silty clay loam, 0 to 2 percent slopes

Mapped Area4,044.41 acres

Rank#14 of 145 in county

330A1.82% of mapped area

Peotone silty clay loam, 0 to 2 percent slopes

Mapped Area3,920.63 acres

Rank#15 of 145 in county

Estimated Soil Components

Showing the 15 largest estimated component series. Component acreages are estimated from SSURGO map-unit component percentages (comppct_r) applied to spatially measured map-unit acreage.

Component	Drainage Class	Hydrologic Group	Estimated Acres	% of Mapped Area
Orthents	Well drained, Moderately well drained	D, C, B	35,598.91	16.54%
Markham	Moderately well drained	C	32,099.82	14.91%
Ashkum	Poorly drained	C/D	27,472.82	12.76%
Ozaukee	Moderately well drained	C	20,084.85	9.33%
Drummer	Poorly drained	B/D	12,007.54	5.58%
Beecher	Somewhat poorly drained	D, C/D	11,620.02	5.4%
Elliott	Somewhat poorly drained	C/D	9,235.92	4.29%
Varna	Moderately well drained	C	7,943.93	3.69%
Peotone	Very poorly drained	C/D	5,830.89	2.71%
Sawmill	Poorly drained	B/D	5,648.76	2.62%
Water	Unspecified	Unspecified	4,412.96	2.05%
Chenoa	Somewhat poorly drained	C/D	3,803.71	1.77%
Graymont	Moderately well drained	C	3,669.21	1.7%
Mundelein	Somewhat poorly drained	B/D	3,493.06	1.62%
Waupecan	Well drained	B	2,946.08	1.37%

Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Orthents

16.54%

Estimated Acres35,598.91

Drainage ClassWell drained, Moderately well drained

Hydrologic GroupD, C, B

Markham

14.91%

Estimated Acres32,099.82

Drainage ClassModerately well drained

Hydrologic GroupC

Ashkum

12.76%

Estimated Acres27,472.82

Drainage ClassPoorly drained

Hydrologic GroupC/D

Ozaukee

9.33%

Estimated Acres20,084.85

Drainage ClassModerately well drained

Hydrologic GroupC

Drummer

5.58%

Estimated Acres12,007.54

Drainage ClassPoorly drained

Hydrologic GroupB/D

Beecher

5.4%

Estimated Acres11,620.02

Drainage ClassSomewhat poorly drained

Hydrologic GroupD, C/D

Elliott

4.29%

Estimated Acres9,235.92

Drainage ClassSomewhat poorly drained

Hydrologic GroupC/D

Varna

3.69%

Estimated Acres7,943.93

Drainage ClassModerately well drained

Hydrologic GroupC

Peotone

2.71%

Estimated Acres5,830.89

Drainage ClassVery poorly drained

Hydrologic GroupC/D

Sawmill

2.62%

Estimated Acres5,648.76

Drainage ClassPoorly drained

Hydrologic GroupB/D

Water

2.05%

Estimated Acres4,412.96

Drainage ClassUnspecified

Hydrologic GroupUnspecified

Chenoa

1.77%

Estimated Acres3,803.71

Drainage ClassSomewhat poorly drained

Hydrologic GroupC/D

Graymont

1.7%

Estimated Acres3,669.21

Drainage ClassModerately well drained

Hydrologic GroupC

Mundelein

1.62%

Estimated Acres3,493.06

Drainage ClassSomewhat poorly drained

Hydrologic GroupB/D

Waupecan

1.37%

Estimated Acres2,946.08

Drainage ClassWell drained

Hydrologic GroupB

Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Drainage Class Distribution

Moderately well drained46.24%

99,540.61 acres

Poorly drained23.94%

51,548.21 acres

Somewhat poorly drained15.62%

33,634.66 acres

Well drained6.06%

13,055.96 acres

Very poorly drained4.38%

9,436.3 acres

Unknown / Unmapped3.53%

7,602.86 acres

Somewhat excessively drained0.12%

250.65 acres

Excessively drained0%

4.3 acres

Hydrologic Soil Group Distribution

Group C34.35%

73,942.85 acres

Group C/D27.97%

60,216.49 acres

Group D16.61%

35,762.33 acres

Group B/D12.99%

27,973.66 acres

Group Unknown / Unmapped3.73%

8,036.25 acres

Group B3.34%

7,194.9 acres

Group A/D0.9%

1,942.76 acres

Group A0%

4.3 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: 2.42%

Nearly Level (0-2%)40.87%

87,982.17 acres

Gently Sloping (2-8%)53.99%

116,230.66 acres

Moderately Sloping (8-15%)2.21%

4,750.03 acres

Steep (15-30%)0.34%

730.9 acres

Very Steep (>30%)0%

0 acres

Unspecified Slope2.5%

5,379.78 acres