USDA SSURGO COUNTY SOIL REFERENCE

Suffolk County, Massachusetts Soil Summary

This page summarizes USDA SSURGO mapped soil information for Suffolk County, Massachusetts.

Mapped Land Coverage

89.11%68,561.2 mapped acres of 76,942.75 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: 1 • 41.14% of mapped area

Largest estimated component

Water

30,920.21 acres (45.1% of mapped area)

Mapped units & components

87 mapped soil units

Top 15 shown below · 76 component series

Dominant drainage class

Unknown / Unmapped

Highest acreage drainage class

Dominant hydrologic group

Group Unknown / Unmapped

Runoff potential classification

Weighted average slope

5.83%

Terrain slope analysis

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Top Mapped Soil Units

Showing the 15 largest mapped units, representing 93.16% of mapped soil area.

Symbol	Map Unit Name	Mapped Acres	% of Mapped Area
1	Water	28,206.88	41.14%
603	Urban land, wet substratum, 0 to 3 percent slopes	7,716.23	11.25%
602	Urban land, 0 to 15 percent slopes	4,815.82	7.02%
655	Udorthents, wet substratum	4,776.65	6.97%
627C	Newport-Urban land complex, 3 to 15 percent slopes	4,295.49	6.27%
626B	Merrimac-Urban land complex, 0 to 8 percent slopes	3,045.67	4.44%
608	Water, ocean	2,809.3	4.1%
630C	Charlton-Hollis-Urban land complex, 3 to 15 percent slopes	2,393.67	3.49%
654	Udorthents, loamy	1,227.89	1.79%
104C	Hollis-Rock outcrop-Charlton complex, 0 to 15 percent slopes	1,088.13	1.59%
65	Ipswich mucky peat, 0 to 2 percent slopes, very frequently flooded	836.82	1.22%
325D	Newport silt loam, 15 to 25 percent slopes	829.1	1.21%
628C	Canton-Urban land complex, 3 to 15 percent slopes	808.8	1.18%
103C	Charlton-Hollis-Rock outcrop complex, 8 to 15 percent slopes	516.68	0.75%
623C	Woodbridge-Urban land complex, 3 to 15 percent slopes	507.24	0.74%

141.14% of mapped area

Water

Mapped Area28,206.88 acres

Rank#1 of 87 in county

60311.25% of mapped area

Urban land, wet substratum, 0 to 3 percent slopes

Mapped Area7,716.23 acres

Rank#2 of 87 in county

6027.02% of mapped area

Urban land, 0 to 15 percent slopes

Mapped Area4,815.82 acres

Rank#3 of 87 in county

6556.97% of mapped area

Udorthents, wet substratum

Mapped Area4,776.65 acres

Rank#4 of 87 in county

627C6.27% of mapped area

Newport-Urban land complex, 3 to 15 percent slopes

Mapped Area4,295.49 acres

Rank#5 of 87 in county

626B4.44% of mapped area

Merrimac-Urban land complex, 0 to 8 percent slopes

Mapped Area3,045.67 acres

Rank#6 of 87 in county

6084.1% of mapped area

Water, ocean

Mapped Area2,809.3 acres

Rank#7 of 87 in county

630C3.49% of mapped area

Charlton-Hollis-Urban land complex, 3 to 15 percent slopes

Mapped Area2,393.67 acres

Rank#8 of 87 in county

6541.79% of mapped area

Udorthents, loamy

Mapped Area1,227.89 acres

Rank#9 of 87 in county

104C1.59% of mapped area

Hollis-Rock outcrop-Charlton complex, 0 to 15 percent slopes

Mapped Area1,088.13 acres

Rank#10 of 87 in county

651.22% of mapped area

Ipswich mucky peat, 0 to 2 percent slopes, very frequently flooded

Mapped Area836.82 acres

Rank#11 of 87 in county

325D1.21% of mapped area

Newport silt loam, 15 to 25 percent slopes

Mapped Area829.1 acres

Rank#12 of 87 in county

628C1.18% of mapped area

Canton-Urban land complex, 3 to 15 percent slopes

Mapped Area808.8 acres

Rank#13 of 87 in county

103C0.75% of mapped area

Charlton-Hollis-Rock outcrop complex, 8 to 15 percent slopes

Mapped Area516.68 acres

Rank#14 of 87 in county

623C0.74% of mapped area

Woodbridge-Urban land complex, 3 to 15 percent slopes

Mapped Area507.24 acres

Rank#15 of 87 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
Water	Unspecified	Unspecified	30,920.21	45.1%
Urban land	Unspecified	D	14,344.96	20.92%
Udorthents	Unspecified	A	5,886.41	8.59%
Newport	Well drained	D, B	4,096.63	5.98%
Merrimac	Somewhat excessively drained	A	1,765.89	2.58%
Charlton	Well drained	B, A	1,597.78	2.33%
Hollis	Well drained, Somewhat excessively drained	D	1,358.54	1.98%
UDORTHENTS	Unspecified	Unspecified	1,282.71	1.87%
Canton	Well drained	B, A	1,048.16	1.53%
Ipswich	Very poorly drained	A/D	754.55	1.1%
Rock outcrop	Unspecified	D	738.45	1.08%
Woodbridge	Moderately well drained	C/D	512.76	0.75%
Beaches	Unspecified	Unspecified	491.33	0.72%
Hinckley	Excessively drained	A	319.02	0.47%
PAXTON	Unspecified	Unspecified	274.9	0.4%

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

Water

45.1%

Estimated Acres30,920.21

Drainage ClassUnspecified

Hydrologic GroupUnspecified

Urban land

20.92%

Estimated Acres14,344.96

Drainage ClassUnspecified

Hydrologic GroupD

Udorthents

8.59%

Estimated Acres5,886.41

Drainage ClassUnspecified

Hydrologic GroupA

Newport

5.98%

Estimated Acres4,096.63

Drainage ClassWell drained

Hydrologic GroupD, B

Merrimac

2.58%

Estimated Acres1,765.89

Drainage ClassSomewhat excessively drained

Hydrologic GroupA

Charlton

2.33%

Estimated Acres1,597.78

Drainage ClassWell drained

Hydrologic GroupB, A

Hollis

1.98%

Estimated Acres1,358.54

Drainage ClassWell drained, Somewhat excessively drained

Hydrologic GroupD

UDORTHENTS

1.87%

Estimated Acres1,282.71

Drainage ClassUnspecified

Hydrologic GroupUnspecified

Canton

1.53%

Estimated Acres1,048.16

Drainage ClassWell drained

Hydrologic GroupB, A

Ipswich

1.1%

Estimated Acres754.55

Drainage ClassVery poorly drained

Hydrologic GroupA/D

Rock outcrop

1.08%

Estimated Acres738.45

Drainage ClassUnspecified

Hydrologic GroupD

Woodbridge

0.75%

Estimated Acres512.76

Drainage ClassModerately well drained

Hydrologic GroupC/D

Beaches

0.72%

Estimated Acres491.33

Drainage ClassUnspecified

Hydrologic GroupUnspecified

Hinckley

0.47%

Estimated Acres319.02

Drainage ClassExcessively drained

Hydrologic GroupA

PAXTON

0.4%

Estimated Acres274.9

Drainage ClassUnspecified

Hydrologic GroupUnspecified

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

Drainage Class Distribution

Unknown / Unmapped81.05%

55,566.66 acres

Well drained11.45%

7,848.31 acres

Somewhat excessively drained3.28%

2,250.62 acres

Very poorly drained1.8%

1,236.98 acres

Moderately well drained1.47%

1,004.51 acres

Excessively drained0.73%

501.35 acres

Poorly drained0.22%

152.75 acres

Hydrologic Soil Group Distribution

Group Unknown / Unmapped76.64%

52,544.16 acres

Group A7.65%

5,247.86 acres

Group B7.4%

5,071.78 acres

Group D4.82%

3,301.85 acres

Group A/D1.21%

827.76 acres

Group C/D1.07%

736.92 acres

Group C0.67%

458.86 acres

Group B/D0.54%

371.99 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: 5.83%

Nearly Level (0-2%)18.67%

12,798.74 acres

Gently Sloping (2-8%)11.36%

7,786.2 acres

Moderately Sloping (8-15%)11.05%

7,579.44 acres

Steep (15-30%)2.03%

1,393.14 acres

Very Steep (>30%)0%

0 acres

Unspecified Slope56.89%

39,003.67 acres