Hydrologic Soil Groups

Definition of Hydrologic soil groups from the National Soil Survey Handbook
Hydrologic List for all series in the U.S. (PDF file)
National Water and Climate Center - Hydraulics and Hydrology

A grouping of soils having the same runoff potential under similar storm and cover conditions. Hydrologic groups are used in equations that estimate runoff from rainfall. Soil properties that influence runoff potential are those that influence the minimum rate of infiltration for a bare soil after prolonged wetting and when not frozen. The soils of the U.S. are placed into four groups A, B, C, D. Definitions of the classes are as follows:

A. Soils with low runoff potential. Soils having high infiltration rates even when thoroughly wetted and consisting chiefly of deep, well drained to excessively well-drained sands or gravels.

B. Soils having moderate infiltration rates even when thoroughly wetted and consisting chiefly of moderately deep to deep, moderately well drained to well drained soils with moderately fine to moderately coarse textures.

C. Soils having slow infiltration rates even when thoroughly wetted and consisting chiefly of soils with a layer that impedes downward movement of water, or soils with moderately fine to fine textures.

D. Soils with high runoff potential. Soils having very slow infiltration rates even when thoroughly wetted and consisting chiefly of clay soils with a high swelling potential, soils with a permanent high water table, soils with a claypan or clay layer at or near the surface, and shallow soils over nearly impervious material.

Official hydrologic soil group listing can be found (some states do not have this information posted) in Section II of the electronic Field Office Technical Guide for the State you are interested in: Connecticut | Maine | Massachusetts | New Hampshire | Rhode Island | Vermont | Other States | This information is also found on the Soil Data Mart site.

Massachusetts (unofficial) Hydrologic Soil Group List:

A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

 

Soil Series/Map Unit Phase Hydrologic
 Group
Acton

Agawam

Agawam, silty subsoil variant

Agawam, silty substratum

Amenia

Amenia variant

Amostown

Au Gres

B

B

C

C

C

B

C

B

Bayboro

Beaches

Belgrade

Berkshire

Berkshire, dark subsoil

Bernardston

Berryland

Berryland variant

Biddeford

Birchwood

Birdsall

Borrow pit

Borrow land, loamy material

Borrow land, sandy and gravelly materials

Borrow pit, glacial till

Brimfield

Broadbrook

Brockton

Brookfield

Boxford

Buckland

Burdick

Buxton

Buxton variant

D

Unclassified

B

B

B

C

D

D

D

C

D

Unclassified

Unclassified

Unclassified

Unclassified

C/D*

C

D

B

C

C

A

C

C

Cabot

Cabot, black surface

Canton

Carver

Charlton

Chatfield

Cheshire

Chilmark

Coastal beach

Colrain

Copake

Cranberry bog

D

D

B

A

B

B

B

C

Unclassified

B

B

D

Deerfield

Dukes

Dumps

Dune land

Dune land and Coastal beach

Dune sand

Dunes, stabilized

Dutchess

B

A

Unclassified

A

A

A

A

B

Eldridge

Elmwood

Elmridge

Enfield

Enosburg

Essex

Evesboro

C

C

C

B

D

C

A

Fredon

Fredon, silty subsoil variant

Freetown

Freetown, ponded

Fresh water marsh

C

C

D

D

D

Galestown

Gloucester

Gravel pit

Groton

A

A

A

A

Hadley

Halsey

Halsey, silty subsoil variant

Hartland

Haven

Hero

Hero, silty subsoil variant

Hinckley

Hinesburg

Hollis

Holyoke

B

D

D

B

B

B

C

A

C

C/D*

C/D*

Ipswich D
Katama

Kendaia

Klej

B

C

B

Leicester

Lenox

Limerick

Lincroft

Ludlow

Lyman

Lyons

C

B

C

A

C

C/D*

D

Made land

Marlow

Marlow, dark subsoil

Matawan

Matunuck

Maybid

Meckesville

Medisaprists

Medisaprists, deep

Medisaprists, sandy surface

Medisaprists, shallow

Melrose

Merrimac

Montauk

Muck

Muck, deep

Muck, shallow

Unclassified

C

C

C

D

D

C

D

D

D

D

C

A

C

D

D

D

Nantucket

Narragansett

Nassau

Newport

Ninigret

Ninigret, silty subsoil variant

Ninigret, silty substratum

Norwell

C

B

C/D*

C

B

C

C

C

Oakville

Occum

Ondawa

A

B

B

Pawcatuck

Paxton

Peacham

Peat

Peru

Pipestone

Pits

Pits, gravel

Pits, quarry

Pits - Udorthents, gravelly

Pittsfield

Pittstown

Plymouth

Podunk

Pollux

Pompton

Pootatuck

Poquonock

D

C

D

D

C

C

A

A

Unclassified

A

B

C

A

B

C

B

B

C

Quarries

Quonset

Unclassified

A

Rainbow

Raynham

Ridgebury

Ridgebury variant (Nantucket)

Rippowam

Riverhead

Riverwash

Rock land

Rock outcrop

Rumney

C

C

C

C

C

B

Unclassified

D

D

C

Saco

Saco variant

Sanded muck

Saugatuck

Scantic

Scantic variant

Scarboro

Scarboro, brownish subsoil variant

Scarboro, silty subsoil variant

Scio

Scitico

Scituate

Shaker

Shapleigh

Shelburne

Stissing

Stockbridge

Sudbury

Suffield

Suncook

Sunderland

Sutton

Swansea

Swanton

D

D

D

C

D

D

D

D

D

B

D

C

D

C/D*

C

C

C

B

C

A

C/D*

B

D

D

Terrace escarpments

Terric Medisaprists

Tidal marsh

Tisbury

Tisbury, SBA variant

B

D

D

B

B

Udipsamments, rolling

Udipsamments, hilly

Udorthents

Udorthents, smoothed

Unadilla

Urban land

A

A

Unclassified

Unclassified

B

Unclassified

Walpole

Walpole, silty subsoil variant

Walpole variant

Wareham

Warwick

Westbrook

Westminster

Wethersfield

Whately

Whately variant

Whitman

Wilbrahma

Windsor

Winooski

Woodbridge

Woodbridge variant

C

C

C

C

A

D

C/D*

C

D

D

D

C

A

B

C

C

 * Dual hydrologic group for bedrock controlled soils. Use group C if bedrock is fractured and D if unfractured.

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