SALEM

ELMER

BUENA

SHILOH

ATSION

AVALON

BRISTOL

CANTON

BEVERLY

JENKINS

RARITAN

CAMDEN

KEYPORT

WHITING

DOROTHY

ALLOWAY

MILLVILLE

ADELPHIA

CAPE MAY

FREEHOLD

NEWFIELD

CASSVILLE

TUCKAHOE

MARMORA

STOCKTON

HOPEWELL

FORTESCUEWOODBINE

ROOSEVELT

ROCKY HILL

LAKEWOOD

COLUMBUS

MARLBORO

WILDWOOD

PLAINFIELD

BRIDGETON

PRINCETON

NEW EGYPT

LAKEHURST

OCEAN CITY

WOODBURY

CEDARVILLE

TUCKERTON

FRANKFORD

PITTSTOWN

FIVE POINTS

OCEANVILLE

BROOKVILLE

RIO GRANDE

TOMS RIVER

CLEMENTON

WEST CREEK

PEMBERTON

ALLENTOWN

BRIDGEPORT

JAMESBURG

RUNNEMEDE

ARTHUR KILL

GREEN BANK

SANDY HOOK

FLEMINGTON

PORT NORRIS

HEISLERVILLE

SEA ISLE CITY

NEW GRETNA

RIEGELSVILLE

PENNINGTON

PITMAN EAST

LUMBERVILLE

HIGHTSTOWN

SHIP BOTTOM

INDIAN MILLS

CHATSWORTH

WOODSTOWN

HAMMONTON

ASBURY PARK

FORKED RIVER

PENNS GROVE

BEACH HAVEN

MOUNT HOLLY

NEWTONVILLE

FRENCHTOWN

SEASIDE PARK

PITMAN WEST

OSWEGO LAKE

ATLANTIC CITY

PHILADELPHIA

WOODMANSIE

FARMINGDALE

PERTH AMBOY

LONG BRANCH

BOMBAY HOOK

CONEY ISLAND

LAMBERTVILLE

MARCUS HOOK

SOUTH AMBOY

MOORESTOWN

BOUND BROOK

THE NARROWS

TRENTON EAST

MAYS LANDING

STONE HARBOR

PLEASANTVILLE

BROWNS MILLS

DELAWARE CITY

TRENTON WEST

DIVIDING CREEK

LONG BEACH NE

PORT ELIZABETH

KESWICK GROVE

WILLIAMSTOWN

TAYLORS BRIDGE

MEDFORD LAKES

BARNEGAT LIGHT

POINT PLEASANT

BEN DAVIS POINT

EGG HARBOR CITY

NEW BRUNSWICK

BRIGANTINE INLET

WILMINGTON SOUTH

MONMOUTH JUNCTION

DOVER

ELKTON

KENTON

DENTON

SMYRNA

MILFORD

CLAYTON

MARYDEL

CECILTON

WYOMING

FREDERICA

MILLINGTON

BURRSVILLE

GOLDSBORO

HARRINGTON

MIDDLETOWN

LITTLE CREEK

NEWARK EAST

SUDLERSVILLE

NEWARK WEST

BENNETTS PIER

SAINT GEORGES

MISPILLION RIVER

KENNETT SQUARE

WILMINGTON NORTH

9-415

5

11-737

0

9-149

16

9-71

-15

9-67

-27

29-813

-3

29-775

-1

9-526

-26

9-519

-26

9-304

-20

29-1621

-24

Villas

Odessa

Newark

Belmar

Brielle

Keyport

Longport

Woodstown

Surf City

Clementon

Lakehurst

Middletown

Mantoloking

Union Beach

Delaware City

Harvey Cedars

Wildwood Crest

Seaside Heights

Spring Lake Heights

CECIL

CAROLINE

KENT

Glendola 

Reservoir

GARDEN STATE PARKWAY

OCEAN

BURLINGTON

ATLANTIC

SALEM

MONMOUTH

CUMBERLAND

MIDDLESEX

MERCER

CAMDEN

GLOUCESTER

HUNTERDON

SOMERSET

UNION

BUCKS

DELAWARE

Dover

Buena

Camden

Avalon

Berlin

Trenton

Matawan

Marlton

Lakewood

Freehold

Red Bank

Cape May

Wildwood

Vineland

New Egypt

Eatontown

Princeton Jamesburg

Keansburg

Millville

Bridgeton

Tuckerton

Hammonton

Glassboro

Toms River

Hightstown

Sea Bright

Sayreville

Rio Grande

Ocean City

Brigantine

Manahawkin

Wilmington

Spring Lake

Asbury Park

Long Branch

Beach Haven

Ship Bottom

Browns Mills

Stone Harbor

Margate City

Ventnor City

Mays Landing

Forked River

Seaside Park

New Brunswick

Atlantic City

Pleasantville

Medford Lakes

Point Pleasant

East Brunswick

Barnegat Light

Egg Harbor City

Atlantic Highlands

Cape May Court House

MARYLAND

Delaware Bay

PENNSYLVANIA

DELAWARE

195

130

206

1

95

70

295

40

30

322

9

NEW JERSEY

Raritan Bay

NEW YORK

40

322

9

Manasquan

Reservoir 

QUEEN 

ANNE'S

CAPE MAY

-20

-20

PHILADELPHIA

UPDIP LIMIT OF

COASTAL PLAIN SEDIMENTS

AVALON

CAPE MAY

TUCKAHOE

MARMORA

WOODBINE

WILDWOOD

OCEAN CITY

RIO GRANDE

HEISLERVILLE

SEA ISLE CITY

STONE HARBOR

PORT ELIZABETH

9-525

-13

9-99

4

9-89

0

9-518

8

9-492

6

9-354

4

9-315

6

9-314

3

9-292

2

9-281

5

9-207

5

9-80

-4

9-78

-7

9-60

-9

9-49

-9

9-43

-9

9-505

-3

9-394

-7

9-385

-5

9-366

-1

9-301

-9

9-213

-4

9-210

-9

9-188

-5 9-180

-5

9-159

-6

9-150

-9

9-54

-16

9-48

-10

9-42

-11

9-30

-14

9-18

-14 9-11

-10

9-617

-13

9-395

-12

9-353

-11

9-74

-12

9-358

-1

Villas

Longport

Wildwood Crest

ATLANTIC

Avalon

Cape May

Wildwood

Rio Grande

Ocean City

Stone Harbor

Cape May Court House

-10

-5

0

75° 74°45'

39°15'

39°

9-52

-17

9-310

5

9-187

-5

Delaware

 Bay

9-36

-15

9-27

-12

NEW CASTLE

KENT

SUSSEX

CAPE MAY

Middle 

Township

UpperTownship

Lower

Township

Dennis

Township

0

0

4 MILES

0

9-662

13

CUMBERLAND 

Egg Harbor 

Township

Hamilton

Township

West Cape 

 May

CMCWD

LTMUA

Figure 1-1. Potentiometric surface of the Cohansey aquifer, New Jersey Coastal Plain, 2008. 

0 1 2

0 1 2 4 KILOMETERS

U.S. Department of the Interior

U.S. Geological Survey 

Prepared in cooperation with the

New Jersey Department of Environmental Protection

Scientific Investigations Report 2013–5232

Cohansey aquifer and Rio Grande water-bearing zone—PLATE 1

DePaul, V.T., and Rosman, Robert, 2015, Water-Level Conditions in the

Confined Aquifers of the New Jersey Coastal Plain, 2008

By

Vincent T. DePaul and Robert Rosman

2015

75°45' 75°30' 75°15' 75° 74°45' 74°30' 74°15' 74°

40°30'

40°15'

40°

39°45'

39°30'

39°15'

39°

Base modified from U.S. Geological Survey digital data, 1:100,000, 1983, 

Universal Transverse Mercator Projection Zone 18 0 2.5 5 10 MILES

Potentiometric surface of the Cohansey aquifer and the 0 2.5 5 10 KILOMETERS

Rio Grande water-bearing zone, 2008

Figure 1-2. Potentiometric surface of the Rio Grande water-bearing zone, New Jersey Coastal Plain, 2008. 

7-185

-63

7-273

-56

EXPLANATION

Observation well with hydrograph—Upper number is well number; 

lower number is water-level altitude, in feet

Approximate updip limit of the Rio Grande water-bearing zone

10,000-milligram-per-liter line of equal chloride concentration 

(Simulated freshwater-saltwater interface, from Pope and 

Gordon, 1999) 

Outcrop of the Kirkwood Formation

U.S. Geological Survey 7.5-minute quadrangle and name

Altitude of potentiometric surface—Dashed where inferred. 

Contour interval is variable. Datum is National Geodetic Vertical 

Datum of 1929 (NGVD 29)

20

Production well—Upper number is well number; lower number is 

water-level altitude, in feet

Observation well—Upper number is well number; lower number is 

water-level altitude, in feet

Estimated location of 250-milligram-per-liter line of equal chloride 

concentration. Dashed where inferred (From DePaul and others, 

2009; Lacombe and Rosman, 2001)

Surface water freshwater-saltwater interface

9-281

5

9-49

-9

9-54

-16

EXPLANATION

Observation well with hydrograph—Upper number is well 

number; lower number is water-level altitude, in feet

U.S. Geological Survey 7.5-minute quadrangle and name

Altitude of potentiometric surface—Dashed where inferred. 

Contour interval is variable. Datum is National Geodetic 

Vertical Datum of 1929 (NGVD 29)

20

Production well—Upper number is well number; lower number 

is water-level altitude, in feet

Observation well—Upper number is well number; lower 

number is water-level altitude, in feet

Estimated location of 250-milligram-per-liter line of equal 

chloride concentration. Dashed where inferred. (Modified 

from DePaul and others, 2009)

Surface water freshwater-saltwater interface

-15

AVALON

ELMER

9-304

-20

CAPE HENLOPEN

PRICE

HOBBS MILTON LEWES

GALENA

RIDGELY

HICKMAN

BAY VIEW

ELLENDALE

EARLEVILLE

NORTH EAST

CHURCH HILL

GREENWOOD FOWLING CREEK

CAPE HENLOPEN

CUMBERLAND

PORT NORRIS

DIVIDING CREEK

CAPE HENLOPEN