LONG ISLAND

Atlantic Ocean

Long Island Sound

NYC

North Fork

South Fork

Suffolk

County

-All Recharge from precipitation

-Total Precipitation 45 inch/year of which

30 inches snow

Block Island Sound

Atlantic Ocean

Long

Island

Sound

Chl

orid

es -

ppm

Mill Lane Production Well 1

0

20

40

60

80

100

120

5/1/

1998

8/6/

1998

11/1

1/19

98

2/16

/199

9

5/24

/199

9

8/29

/199

9

12/4

/199

9

3/10

/200

0

6/15

/200

0

9/20

/200

0

12/2

6/20

00

4/2/

2001

7/8/

2001

10/1

3/20

01

Date

Ch

lori

des

- p

pm

0500100015002000250030003500

Mo

nth

ly P

um

pa

ge

(T

ho

us

an

ds

of

Ga

llon

s)

cl pumpage

Mill Lane Production Well 2

0102030405060708090

5/1/

1998

8/4/

1998

11/7

/199

8

2/10

/199

9

5/16

/199

9

8/19

/199

9

11/2

2/19

99

2/25

/200

0

5/30

/200

0

9/2/

2000

12/6

/200

0

3/11

/200

1

6/14

/200

1

9/17

/200

1

12/2

1/20

01

Date

Ch

lori

des

- p

pm

050010001500200025003000

Mo

nth

ly P

um

pa

ge

(T

ho

us

an

ds

of

Ga

llon

s)

cl pumpage

High

Chlorides

High

Chlorides

Depth N

010203040

0 5010 6020 7030 8040 9050 10060 11070 12080 13090 140

100 150110 160120 170130140150160 170

North Rd (C.R. 48)

116844 Well 2 2

Sump

Well 1 116843

116845

Cl

49.1 50.0 46.5 54.6 116.4 115.4 50.2 29.5 32.5 32.7 24.42019.9

Cl

9.6 10.2 10.8 20.9 18.5 122.7 132.9 78.7 24.0 29.8 43.4 34.227.0 22.7 21.1

CL32.020.226.824.914.831.655.675.763.045.832.622.734.543.7

Profile 2 Profile 1

Profile 3

High

Chlorides

High

Chlorides

High Chlorides

Low Br/Cl Ratio

•Joseph Pokorny, Steve Colabufo, Richard Bova (SCWA)

•Fred Stumm, Tony Chu, Craig Brown (USGS)